[obol] Re: obol Digest, Vol 33, Issue 17
Robert Brock
brockfr at SpiritOne.com
Tue Jul 18 08:30:38 PDT 2006
Pleasse remove me from list., Thanks.
----- Original Message -----
From: <obol-request at lists.oregonstate.edu>
To: <obol at lists.oregonstate.edu>
Sent: Monday, July 17, 2006 12:00 PM
Subject: obol Digest, Vol 33, Issue 17
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>
> Today's Topics:
>
> 1. More on Purple Martins (Pat Waldron)
> 2. Re: Corvallis dove question (Wayne Hoffman)
> 3. Re: Corvallis dove question (Dennis P. Vroman)
> 4. RE: Corvallis dove question (Peggy Krause)
> 5. WHITE PELICANS at Baskett Slough - Dallas / Rickreall Oregon
> area (Annette Lange)
> 6. Re: More on Purple Martins (Alan Reid)
> 7. Zostera japonica (aka dwarf eelgrass) - Request For
> Observations & Info (Cindy Ashy)
> 8. please remove me from the list serve (Jenny Goodnough)
> 9. Mistake in email: Re: Zostera japonica (aka dwarf eelgrass) -
> Request For Observations & Info (Cindy Ashy)
> 10. Re: Re: Corvallis dove question (Wayne C. Weber)
> 11. Re: Blue-gray Gnatcatcher nesting in Benton County (Arch McCallum)
> 12. Mountain Quail detection (Lars and Gail Norgren)
> 13. Central Oregon (Charles R. Gates)
> 14. Coastal Lincoln Co. sightings - 7/16 (WALTER NELSON)
> 15. peregrines (Bryce.Sandy at epamail.epa.gov)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 16 Jul 2006 13:16:07 -0700
> From: Pat Waldron <puma at smt-net.com>
> Subject: [obol] More on Purple Martins
> To: obol <obol at lists.orst.edu>
> Message-ID: <C0DFEC97.2F4D%puma at smt-net.com>
> Content-Type: text/plain; charset="US-ASCII"
>
>
> I have 10 Purple Martin nest boxes up, and I think they are all loaded.
> If they have been monogamous, then the chances of survival are high. If
> they
> are into polgyny, one male mates with more than one female, then I will
> find
> dead chicks and nests with eggs after they have left. I am seeing lots of
> adult males this year, which is good. It seems the second and third year
> they were here, they tried too hard to get a colony going, and there were
> not enough adults to feed all the chicks. That is my hunch. This is the
> sixth year they have nested on the ranch.
> I started out with 8 nest boxes up this year, and I saw a horrible
> fight,
> as a female PUMA was looking into a Tree Swallow nest box near by that was
> occupied. She was attacked by about 20 Tree Swallows and could barely fly
> 10
> inches to get on wire. The Trees did not give up. I saw her hanging
> up-side
> -down still being attacked. She eventually flew off, and was pursued. I
> went
> to the barn and prepared 2 more Martin boxes, and they were immeadiately
> checked out and occupied. I have only one box left, so I know I have some
> carpentry to do this winter. Swallows take a 1.5 inch hole, Martins take
> a
> 2 inch hole, and like a deep box, we make ours 12 inches deep and add a 4
> inch covered porch.
> I have been told - so it may not be valid- that the Martins on the West
> Coast are a sub species, and do NOT prefer condominium houses. I have not
> heard of condos being taken by Martins on the West coast, and I know a few
> folks that have bought them without success. I would be interested in
> knowing if any west coast condos are successful.
> Pat Waldron
> East of Scio
> Linn Co.
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sun, 16 Jul 2006 14:31:12 -0700
> From: "Wayne Hoffman" <whoffman at peak.org>
> Subject: Re: [obol] Corvallis dove question
> To: <jgeier at attglobal.net>, "Oregon Birders OnLine"
> <obol at lists.oregonstate.edu>
> Message-ID: <003e01c6a91f$29fa7d00$e3341c40 at D48XBZ51>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=response
>
> I have extensive experience with Eurasian Collared-Doves from my years in
> Florida, and considerable, although less-extensive experience with "Ringed
> Turtle-Doves", both in the St Petersburg population, free-flying escapes
> elsewhere, and captive birds.
>
> The three photos posted do not display the under-tail features at all
> well,
> and based only on those, I would say, indeterminate.
>
> HOWEVER: The two forms differ in a number of more subtle features of
> size
> and proportions. Eurasian Collared-Doves are larger, and tend to look
> more
> rotund. When in the cmpany of Mourning Doves (usual in Florida)
> Collared-Doves are distinctly larger and heavier-bodied. "Ringed" are
> similar to or SLIGHTLY smaller than Mourning Doves, and have less of the
> heavy-bodied shape. These photos lack size comparisons, but the shape
> looks
> good for Eurasian Collared.
>
> In addition, the plumage of this bird appears spot-on correct for Eurasian
> Collared-Dove. As you have pointed out, those other domesticated things
> are
> highly variable, but I have never identified one with the same shades of
> head and back color as this bird. My experience is that "Ringed" tend to
> be
> paler, particularly on the head and back, and when they are darker, they
> run
> to tan or brown washes rather than this gray.
>
> Thus, to me this bird looks distinctly more like Eurasian Collared-Dive
> than
> like any of the "Ringed Turtle-Doves" that I have seen.
>
> I hope this helps.
>
> One caviat: Our Mourning Doves here possibly are larger than the ones in
> Florida?
>
> Wayne Hoffman
>
>
> ----- Original Message -----
> From: "Joel Geier" <jgeier at attglobal.net>
> To: "Oregon Birders OnLine" <obol at lists.oregonstate.edu>
> Sent: Saturday, July 15, 2006 6:05 PM
> Subject: [obol] Corvallis dove question
>
>
>> Hello folks,
>>
>> Back in late May, photos of a "collared" dove in Corvallis were posted on
>> the following URL:
>>
>> http://www.bitphotography.com/proofs/dove
>>
>> There was one comment on OBOL by a person who simply said "Yes, Eurasian
>> Collared Dove" without discussion, citing personal familiarity with them
>> from Florida.
>>
>> Looking at these photos now, I wonder what are the conclusive marks to
>> rule out Ringed Turtle-Dove?
>>
>> The bird does appear to have darker primaries than typical for Ringed
>> Turtle-Dove, though not darker than African Collared-Dove which is the
>> ancestral form of the domesticated Ringed Turtle-Dove. We have had one
>> such instance in the general area in the past (a bird in Independence
>> that
>> Jo Yeager and I spent a good 1+ hour looking at at close range with primo
>> views of the undertail, and which definitely had white undertail coverts
>> though it had darker primaries than typical Ringed Turtle-Dove, similar
>> to
>> this bird).
>>
>> In view 1 the undertail coverts of the bird are not visible. In views 2 &
>> 3 (IMG_0991.htm and IMG_0995.htm) they are shaded but -- even though
>> shaded appear to be more whitish than the back, which I thought was a
>> mark
>> for African Collared-/Ringed Turtle-Dove.
>>
>> Views 2 & 3 do appear to show dark outer webs at the base of the tail,
>> though neither view shows the underside of the webs.
>>
>> So my question is, are these photos really diagnostic or should we leave
>> this bird as "Collared-Dove sp."?
>>
>> One Collared-Dove sp. was also seen in Corvallis in early May by an
>> experienced birder who thought the undertail coverts were white rather
>> than gray. There are some photos of that bird but apparently not
>> diagnostic (expressed opinion of those who looked at them, I have not
>> seen
>> them).
>>
>> For those who have had experience mulling this over, what does it take to
>> establish a first record of Eurasian Collared-Dove in an area? Granted it
>> looks like sooner or later we are bound to be overrun with them, but what
>> does it take for us to say for sure, "They're here!"
>>
>> Or is it possible that when we get overrun, it might be a mish-mash of
>> Eurasian Collared-Doves, feral Turtle-Doves which have started to
>> manifest
>> ancestral traits, and possibly hybrids of the two?
>>
>> In other words, what's a poor local field-notes compiler to do?
>>
>> Thanks & good birding,
>> Joel
>>
>> --
>> Joel Geier
>> jgeier at attglobal.net
>>
>>
>> _______________________________________________
>> obol mailing list
>> obol at lists.oregonstate.edu
>> http://lists.oregonstate.edu/mailman/listinfo/obol
>>
>> To unsubscribe, send a message to:
>> obol-leave at lists.oregonstate.edu.
>>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sun, 16 Jul 2006 15:15:08 -0700
> From: "Dennis P. Vroman" <dpvroman at budget.net>
> Subject: Re: [obol] Corvallis dove question
> To: "Wayne Hoffman" <whoffman at peak.org>, <jgeier at attglobal.net>,
> "Oregon Birders OnLine" <obol at lists.oregonstate.edu>
> Message-ID: <000701c6a925$517f2910$b3351c40 at Warbler>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=response
>
> Wayne and Others interested,
>
> In regards to Mourning Dove population sizes:
>
> ID Guide to NA Birds (Pyle 1997) list 3 Mourning Dove subspecies:
>
> In Oregon would be Zenaida macroura spp. marginella; wing lengths (males
> and
> females) range from 133 - 159 mm, tails range from 117 - 163 mm.
>
> Z.m. spp. carolinensis (would include Flordia, part at least) wing lengths
> range 131 - 152 mm, tails range from 114 - 153 mm.
>
> Z.m. spp macroura (breeds south Flordia Islands) wing lengths range 128 -
> 144 mm, tails range from 96 - 133 mm.
>
> Could not find any thing in the CRC Handbook of Avian Body Masses
> (Dunning,
> Jr - editor 1993) on the different subspecies of Mourning Dove.
>
> Dennis
>
>
>
>>
>> One caviat: Our Mourning Doves here possibly are larger than the ones in
>> Florida?
>>
>> Wayne Hoffman
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sun, 16 Jul 2006 19:48:00 -0700
> From: "Peggy Krause" <peggyk at exchangenet.net>
> Subject: RE: [obol] Corvallis dove question
> To: "'Dennis P. Vroman'" <dpvroman at budget.net>, "'Wayne Hoffman'"
> <whoffman at peak.org>, <jgeier at attglobal.net>, "'Oregon Birders OnLine'"
> <obol at lists.oregonstate.edu>
> Message-ID: <003601c6a94b$6ac5b120$6500a8c0 at bitphoto>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi:
>
> Taker of the pictures here. The bird in the photos was definitely larger
> than the mourning doves I normally have in my yard. It was only here
> about 2 weeks and I haven't seen it since. But, when it was coming
> around my feeder, it was in the company of several mourning doves so I
> could judge that it was larger. That's what made me notice it.
>
> Peggy
>
> -----Original Message-----
> From: obol-bounces at lists.oregonstate.edu
> [mailto:obol-bounces at lists.oregonstate.edu] On Behalf Of Dennis P.
> Vroman
> Sent: Sunday, July 16, 2006 2:15 PM
> To: Wayne Hoffman; jgeier at attglobal.net; Oregon Birders OnLine
> Subject: Re: [obol] Corvallis dove question
>
>
> Wayne and Others interested,
>
> In regards to Mourning Dove population sizes:
>
> ID Guide to NA Birds (Pyle 1997) list 3 Mourning Dove subspecies:
>
> In Oregon would be Zenaida macroura spp. marginella; wing lengths (males
> and
> females) range from 133 - 159 mm, tails range from 117 - 163 mm.
>
> Z.m. spp. carolinensis (would include Flordia, part at least) wing
> lengths
> range 131 - 152 mm, tails range from 114 - 153 mm.
>
> Z.m. spp macroura (breeds south Flordia Islands) wing lengths range 128
> -
> 144 mm, tails range from 96 - 133 mm.
>
> Could not find any thing in the CRC Handbook of Avian Body Masses
> (Dunning,
> Jr - editor 1993) on the different subspecies of Mourning Dove.
>
> Dennis
>
>
>
>>
>> One caviat: Our Mourning Doves here possibly are larger than the ones
>
>> in
>> Florida?
>>
>> Wayne Hoffman
>
>
> _______________________________________________
> obol mailing list
> obol at lists.oregonstate.edu
> http://lists.oregonstate.edu/mailman/listinfo/obol
>
> To unsubscribe, send a message to:
> obol-leave at lists.oregonstate.edu.
>
>
>
> ------------------------------
>
> Message: 5
> Date: Sun, 16 Jul 2006 20:28:24 -0700 (PDT)
> From: Annette Lange <nettielh at yahoo.com>
> Subject: [obol] WHITE PELICANS at Baskett Slough - Dallas / Rickreall
> Oregon area
> To: obol at lists.oregonstate.edu
> Message-ID: <20060717032824.74696.qmail at web50214.mail.yahoo.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Audubon Trip led by David Smith (and many other knowledgeable and sharing
> birders) was a success Sat. July 15. Participants even brought scopes!
> Amazing!
> Wetlands outside of Banks were beautiful - my fisrt Black-Throated Gray
> warbler - and the Western Tanagers were in ideal light. Gorgeous!
> .. === === ===
> Strangest of all -.. WHITE PELICANS out in the shallows at Baskett
> Slough where we were looking for the illusive Black Duck...... I think all
> the nutria have pushed it far afield. The nutria were everywhere.... as
> were the cliff swallows. Droppings at least 1/2 inch thick.
> Annette Nettielh at yahoo.com
>
>
>
>
>
> ---------------------------------
> Do you Yahoo!?
> Everyone is raving about the all-new Yahoo! Mail Beta.
> -------------- next part --------------
> An HTML attachment was scrubbed...
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>
> ------------------------------
>
> Message: 6
> Date: Sun, 16 Jul 2006 21:29:35 -0700
> From: "Alan Reid" <areid at nu-world.com>
> Subject: Re: [obol] More on Purple Martins
> To: "Pat Waldron" <puma at smt-net.com>, "obol" <obol at lists.orst.edu>
> Message-ID: <008e01c6a959$9bbd8470$0200a8c0 at ReidDesktop>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Probably not really a Condo, but for a few years there was a unit of 4
> together at the Florence Old Town Docks that had multiple residents.
>
> Alan Reid areid at nu-world.com
> 2 miles below Leaburg
> on the McKenzie Hwy.
>
> ----- Original Message -----
> From: "Pat Waldron" <puma at smt-net.com>
> To: "obol" <obol at lists.orst.edu>
> Sent: Sunday, July 16, 2006 1:16 PM
> Subject: [obol] More on Purple Martins
>
>
>>
>> I have 10 Purple Martin nest boxes up, and I think they are all loaded.
>> If they have been monogamous, then the chances of survival are high. If
>> they
>> are into polgyny, one male mates with more than one female, then I will
>> find
>> dead chicks and nests with eggs after they have left. I am seeing lots of
>> adult males this year, which is good. It seems the second and third year
>> they were here, they tried too hard to get a colony going, and there were
>> not enough adults to feed all the chicks. That is my hunch. This is the
>> sixth year they have nested on the ranch.
>> I started out with 8 nest boxes up this year, and I saw a horrible
>> fight,
>> as a female PUMA was looking into a Tree Swallow nest box near by that
>> was
>> occupied. She was attacked by about 20 Tree Swallows and could barely fly
>> 10
>> inches to get on wire. The Trees did not give up. I saw her hanging
>> up-side
>> -down still being attacked. She eventually flew off, and was pursued. I
>> went
>> to the barn and prepared 2 more Martin boxes, and they were immeadiately
>> checked out and occupied. I have only one box left, so I know I have some
>> carpentry to do this winter. Swallows take a 1.5 inch hole, Martins take
>> a
>> 2 inch hole, and like a deep box, we make ours 12 inches deep and add a 4
>> inch covered porch.
>> I have been told - so it may not be valid- that the Martins on the West
>> Coast are a sub species, and do NOT prefer condominium houses. I have not
>> heard of condos being taken by Martins on the West coast, and I know a
>> few
>> folks that have bought them without success. I would be interested in
>> knowing if any west coast condos are successful.
>> Pat Waldron
>> East of Scio
>> Linn Co.
>>
>>
>> _______________________________________________
>> obol mailing list
>> obol at lists.oregonstate.edu
>> http://lists.oregonstate.edu/mailman/listinfo/obol
>>
>> To unsubscribe, send a message to:
>> obol-leave at lists.oregonstate.edu.
>>
>
>
>
>
> ------------------------------
>
> Message: 7
> Date: Sun, 16 Jul 2006 21:55:52 -0700 (PDT)
> From: Cindy Ashy <tunicate89 at yahoo.com>
> Subject: [obol] Zostera japonica (aka dwarf eelgrass) - Request For
> Observations & Info
> To: OBOL <obol at lists.oregonstate.edu>
> Message-ID: <20060717045552.5051.qmail at web51801.mail.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> Hello All.
>
> Zostera japonica (aka Dwarf Eelgrass, Japanese Eelgrass) is a non-native
> eelgrass that came in with cultivated oysters. In Oregon, it currently
> grows
> mostly in the upper intertidal zone, prime shorebird roosting and feeding
> habitat. At low tide when its short blades are lying flat, it gives the
> mudflat
> a green hairy look. A picture of Zostera japonica, along with other
> non-native
> species found in Oregon estuaries, can be found at the following URL:
> http://web.science.oregonstate.edu/~yamadas/second.html
>
> While Oregon has developed a plan to deal with Spartina and several groups
> seem
> dedicated to controlling knotweed, it seems to me that Zostera japonica
> may be
> flying a bit under the radar.
>
> I would be grateful to hear from birders their observations of bird
> interaction
> with Zostera japonica, particularly shorebirds (which is why I've waited
> to
> shorebird season to post this). For example, do you see shorebirds avoid
> feeding on the portion of mudflat covered with Zostera japonica as they
> work
> their way down the beach? (I did in the Spring, especially with Whimbrels)
> I'd
> be interested in which species do forage and which do not forage on
> mudflat
> covered with it. Another example....do you see shorebirds avoid roosting
> on
> mudflat covered with Zostera japonica as the tide comes in? (I have seen
> shorebirds avoid mudflat covered with the stuff in Sallys
> Bend...especially
> peeps...they seemed to fly away as soon as all the areas that weren't
> covered
> with Zostera japonica were underwater, even though there was plenty of
> beach
> left for roosting).
>
> I would also be interested in any changes to invertebrate fauna you may
> have
> observed in areas that have become overgrown with Zostera japonica....even
> something as general as there seems to be less burrows.
>
> I am interested in learning more specifically where this is growing in
> Oregon
> and information about how extensive each patch is. If you know of any
> efforts
> to eradicate this non-native or even people talking about such a plan,
> please
> let me know.
>
> For those of you who birdwatch in the Yaquina Bay area, there are large
> patches
> of the stuff in Sallys Bend. There is also a patch on the Hatfield side of
> the
> bay.
>
> I think the importance of early detection and early eradication of
> non-native
> species from both the ecological and economical perspective can not be
> over-emphasized. However, getting people committed to actually doing these
> types of projects early on before they become more of a problem is a real
> challenge. So far, Zostera japonica has not been a real threat to
> commercial
> species but neither was Spartina in Washington in 1990 when there was only
> a
> "small" patch which could have been removed by digging....now their only
> hope
> of eradication is the aerial spraying of herbicides which are non-species
> specific and is costing millions....but then there is the problem of how
> do you
> fund the removal of non-natives that aren't impacting commercial
> species....maybe we focus on the loss of mudflat habitat and how much
> cheaper
> it would be if we catch it early?
>
> I will be happy to post a summary of all observations reported to me/OBOL.
> I
> read OBOL almost daily so if you want to post your observations to OBOL
> directly I will see them...or you can use the email in my sig. Thanks in
> advance.
>
> Your observations could be end up being helpful in convincing people to
> develop
> a plan for this non-native species.
>
> Cindy Ashy
> tunicate AT yahoo.com
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>
>
> ------------------------------
>
> Message: 8
> Date: Sun, 16 Jul 2006 22:23:53 -0700
> From: Jenny Goodnough <jenny at peak.org>
> Subject: [obol] please remove me from the list serve
> To: "obol at lists.oregonstate.edu" <obol at lists.oregonstate.edu>
> Message-ID: <44BB1EE9.3060405 at peak.org>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Please remove me from the obol list serve. We are moving to Alaska and
> I will be checking in via the webpage.
>
> I have found this to be a most informative and interesting experience
> and want to say thank you to all who share their expertise and findings.
>
> I have learned a lot.
>
> Jenny Goodnough
> Eugene
>
>
> ------------------------------
>
> Message: 9
> Date: Sun, 16 Jul 2006 22:47:38 -0700 (PDT)
> From: Cindy Ashy <tunicate89 at yahoo.com>
> Subject: [obol] Mistake in email: Re: Zostera japonica (aka dwarf
> eelgrass) - Request For Observations & Info
> To: OBOL <obol at lists.oregonstate.edu>
> Message-ID: <20060717054738.72440.qmail at web51802.mail.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> Sorry guys, my email should be:
>
> tunicate89 AT yahoo.com
>
> (I forgot the 89 part)
>
> Cindy Ashy
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>
>
> ------------------------------
>
> Message: 10
> Date: Sun, 16 Jul 2006 23:08:01 -0700
> From: "Wayne C. Weber" <contopus at telus.net>
> Subject: Re: [obol] Re: Corvallis dove question
> To: "JOEL GEIER" <jgeier at attglobal.net>
> Cc: OBOL <obol at lists.oregonstate.edu>
> Message-ID: <00e801c6a967$5c46b060$6500a8c0 at bc.hsia.telus.net>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Joel and Oregon Birders,
>
> For males, at least, I would like to offer the opinion that the song is
> the best method of separating Ringed Turtle-Doves from Eurasian Collared-
> Doves in the field. The two species have very different songs. My
> impression is that both species sing year-round, but I may be incorrect
> on this point.
>
> I don't know how the song of the Ringed Turtle-Dove compares
> with that of the ancestral African Collared-Dove, having never heard the
> latter.
>
> Of course, songs cannot be documented from photographs. This is
> one of the many bird ID questions where a photograph alone may not be
> enough to conclusively determine the ID. A full description of the bird,
> including song and other behavior patterns, may be needed.
>
> At the rate that Eurasian Collared-Doves are increasing in the Pacific
> Northwest, the question of distinguishing them from the infrequent
> escaped Ringed Turtle-Dove may soon be academic. It seems likely
> that the former will soon vastly outnumber the latter, and that any
> escaped Ringed Turtle-Doves that do survive will disappear quickly
> because of competition from or interbreeding with Collared-Doves.
>
> Wayne C. Weber
> Delta, BC
> contopus at telus.net
>
> .
>
>
>
> ----- Original Message -----
> From: "Joel Geier" <jgeier at attglobal.net>
> To: "Oregon Birders OnLine" <obol at lists.oregonstate.edu>
> Sent: Sunday, July 16, 2006 9:19 AM
> Subject: [obol] Re: Corvallis dove question
>
>
> Hello folks,
>
> I've been looking at some "dove fancier" pages to try to get a handle on
> Ringed Turtle-Dove variation and the pet trade.
>
> What I learned is that:
>
> (1) the plumage of Ringed Turtle-Doves is considered to be a recessive
> genetic trait relative to the ancestral African Collared-Dove, and
>
> (2) apparently there is a common practice of back-crossing domestic
> Ringed Turtle-Dove to African Collared-Dove stock to produce the
> ancestral plumage, and those birds are in the pet trade.
>
> This, along with the occurrence of a somewhat tame-acting but
> free-flying Collared-Dove sp. in Independence (Polk Co.) a few years ago
> which showed all marks of African Collared-Dove in close study,
> convinces me that this species/plumage should be considered in diagnosis
> of Collared-Dove sp. sightings in this part of Oregon. Perhaps we could
> call them "Africanized Ringed Turtle-Doves" a la Africanized bees.
>
> African Collared-Dove (per bird guides and photos on dove sites on the
> web) has dark primaries very similar in appearance to Eurasian
> Collared-Dove. Hence this field mark (mentioned in Sibley) does not seem
> to be diagnostic on its own if "Africanized" turtle-doves need to be
> considered.
>
> African has white (rather than black) outer webs on the base of the tail
> feathers, so this field mark still seems to be diagnostic for Eurasian
> Collared-Dove. However, African does show a fairly extensive triangle of
> black at the base of the tail on either side of the undertail coverts,
> which might make this mark difficult to be certain of.
>
> The best field mark for distinguishing Eurasian Collared-Dove from
> Ringed Turtle-Doves, of either standard or "Africanized" stock, seems to
> be the white undertail coverts (vs. dusky gray on Eurasian).
>
> Considering this information, my question posed earlier boils down to
> this:
>
> Are the views of the outer webs at the tail base, and of the undertail
> coverts on the Corvallis bird, adequate to discriminate between Eurasian
> Collared-Dove and "Africanized" Ringed Turtle-Dove?
>
> I would appreciate if OBOLers who have field experience with this ID
> problem could comment on said photos.
>
> Thanks,
> Joel
>
> --
> Joel Geier
> jgeier at attglobal.net
>
> _______________________________________________
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>
>
>
> ------------------------------
>
> Message: 11
> Date: Mon, 17 Jul 2006 08:24:38 -0700
> From: "Arch McCallum" <archmcc at qwest.net>
> Subject: Re: [obol] Blue-gray Gnatcatcher nesting in Benton County
> To: jgeier at attglobal.net, "Oregon Birders OnLine"
> <obol at lists.oregonstate.edu>
> Message-ID: <6.1.1.1.0.20060717081630.05f3bdf0 at pop.eugn.qwest.net>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> At 05:39 PM 7/13/2006, Joel Geier wrote:
>>Hello folks,
>>
>>Elsie Eltzroth and Marcia Cutler today (13 Jul) confirmed nesting by a
>>Blue-gray Gnatcatcher at a private residence south of Philomath in Benton
>>County. The nest was in a fork of a nearly bare, lowest branch of a cherry
>>tree just 3-4 ft. off the ground.
>
> Hello OBOL,
> In a later post, Joel retracted the bggn identification and suggested an
> empid, possibly pacslope. Actually, it's highly unlikely to be pacslope,
> as
> they normally place their nests on a flat surface beside a vertical
> surface, e.g., the window ledge of a campground bathroom building.
> [Speaking of which, the new generation of prefab toilet buildings that
> seems to be used by all public agencies is putting a lot of deserving
> western flycatchers and phoebes out of a home. They seem to be designed to
> prevent nest placement by these birds.]
>
> I even have my doubts about any empid, and any empid other than wifl and
> psfl in Philomath would be a pretty good record, wouldn't it? If by fork,
> they mean horizontal, that would normally eliminate all empids but
> Acadian,
> which is unique in the genus for its vireo-like nest hanging from the two
> tynes of a horizontal fork.
>
> So, how about a vireo?
>
> Good nest-finding,
> Arch McCallum
> Eugene
>
>
>
>
> ------------------------------
>
> Message: 12
> Date: Mon, 17 Jul 2006 09:15:07 -0700
> From: Lars and Gail Norgren <gnorgren at earthlink.net>
> Subject: [obol] Mountain Quail detection
> To: obol <obol at lists.oregonstate.edu>
> Message-ID: <2c2e500af9adc3f39201804639640ce9 at earthlink.net>
> Content-Type: text/plain; charset=US-ASCII; format=flowed
>
> The Dog Days of August with their dreadful
> silent dawns are approaching. One way to compensate
> this loss is to look for Mountain Quail, whose
> detectability goes from its annual low in June
> to its annual high in August. Pat Waldron posted
> the arrival in her yard of Mountain Quail chicks
> about the last day of June. Inspired by this I
> took a walk first thing Sunday morning July 2
> and was rewarded by a group of downy chicks
> somewhat under 3km from my house. I never saw
> the parents. Pat mentioned dust baths in surprisingly
> hard gravel roads. I had just passed a dozen
> such traces when I saw the chicks.
> These dust baths make it possible to locate
> quail territories without hearing or seeing them.
> You then have the option of returning in the near
> future in hopes of better luck. The Mountain Quail
> remove the coarsest gravel from the road and work
> up a layer of dust in the resulting shallow bowl.
> The scrape is about the size of an adult human hand,
> that is to say the area a Mountain Quail would take
> up when lying on its side. I can't think of other
> birds in this habitat that would have the power
> to scrape through such hard packed ground. A few
> small body feathers are often left behind. Once
> established, these dust baths are used daily. The
> ones in my neighborhood occur in the same places
> used by quail in the middle of winter. If you can't
> return to a spot immediately, visiting it months
> later may still be rewarding.
> Lars Norgren
> MANNING OREGON
>
>
>
> ------------------------------
>
> Message: 13
> Date: Mon, 17 Jul 2006 09:34:30 -0700
> From: "Charles R. Gates" <cgates at empnet.com>
> Subject: [obol] Central Oregon
> To: "obol" <obol at lists.orst.edu>
> Message-ID: <DAEPJHIHFEIMNNFCNJKHGEJBDGAA.cgates at empnet.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I spent the weekend birding with Steve Shunk's Paradise Birding Woodpecker
> Tour. We did pretty well considering the birding gets very slow after
> 9:00
> am in July. We saw 101 Species. We found all of the Central Oregon
> Woodpeckers except 3-toed. We searched every known 3-toad hide-out
> including Hosmer Lake but found nothing. Here are the highlights:
>
> COLD SPRINGS CAMPGROUND - DESCHUTES COUNTY
> 2 White-headed Woodpeckers
> 1 BLACK-BACKED WOODPECKER
> 2 Hammond's Flycatchers
> 2 Pygmy Nuthatches
> 1 Green-tailed Towhee
> 1 Fox Sparrow
>
> NEAR JACK LAKE - JEFFERSON COUNTY
> 3 Olive-sided Flycatchers
> 2 Hermit Thrush
> 2 Dusky Flycatchers
> 3 Williamson's Sapsuckers
>
> CENTURY DRIVE - DESCHUTES COUNTY
> NORTHERN GOSHAWK - Crossed the road in front of us
> Townsend's Solitaire
> 12 Lewis's Woodpeckers - Entrada Burn
> 3 PURPLE FINCHES
>
> WICKIUP RESERVOIR - DESCHUTES COUNTY
> 12 White Pelicans
> 65 Long-billed Dowitcher
> 1 Sora
>
> TUMALO RESERVOIR - DESCHUTES COUNTY
> 2 Greater Yellowlegs
> 7 Western Sandpipers
> 8 Least Sandpipers
> 2 Spotted Sandpipers
>
> BRUSH CREEK BASIN - JEFFERSON COUNTY
> 2 Cassin's Finch
> 3 PURPLE FINCH
> 2 Pileated Woodpeckers - Drumming in close
> 2 Red-naped Sapsuckers
> 1 Sooty Grouse
> 1 Lazuli Bunting
> 1 Downy Woodpecker
> 1 MacGillivray's Warbler
>
> FOREST SERVICE GRAVEL PIT - SANTIAM PASS - LINN COUNTY
> 1 Spotted Sandpiper
> 1 BLACK-BACKED WOODPECKER
>
> CABBOT LAKE TRAILHEAD - JEFFERSON COUNTY
> Vaux's Swift
>
> LAKE CREEK LODGE - NEAR CAMP SHERMAN - JEFFERSON COUNTY
> 1 WHITE-HEADED WOODPECKER
> 4 Rufous Hummingbirds
>
> CAMP SHERMAN - JEFFERSON COUNTY
> 1 Dipper
>
> Chuck Gates
> Powell Butte
>
>
>
>
>
>
> ------------------------------
>
> Message: 14
> Date: Mon, 17 Jul 2006 10:23:38 -0700
> From: "WALTER NELSON" <nelsoncheek at charter.net>
> Subject: [obol] Coastal Lincoln Co. sightings - 7/16
> To: <obol at lists.oregonstate.edu>
> Message-ID: <52sfh8$1pdk86v at mxip14a.cluster1.charter.net>
> Content-Type: text/plain; charset="us-ascii"
>
> Yesterday afternoon (7/16) a flock of 5 RAVENS flew north over our yard,
> presumably a family group since a yelling juvenile was bringing up the
> rear
> of the procession. I've heard the juveniles in nearby treetops for the
> past
> 2 weeks but this was the first sighting. It's a good day if I see even
> one
> Raven locally, so this was a notable high count as well as the first
> visual
> confirmation of nearby breeding. The local Crows were clearly unhappy
> about
> the Ravens' presence, but did not attack. Possibly they felt outnumbered.
>
>
>
> Also yesterday afternoon the local Starlings alerted me to the presence of
> a
> juvenile SHARP-SHINNED HAWK soaring southward just east of the ocean
> bluff.
>
>
>
> Yesterday morning a juvenile MOURNING DOVE visited our feeder. Over the
> past 8 years visits by this species have increased from annual to
> occasional
> to semi-regular, but this was the first juvenile we have noted.
>
>
>
> Finally, if coastal visitors are interested in seeing MARBLED MURRELETS on
> their dawn flights to nesting areas, now is the time and Cape Perpetua
> Scenic area is the place. All that is required is to haul oneself out of
> bed in time to be at the Cape Creek Campground by 5 AM. Drive to the end
> of
> the campground road, park, get out of the car and look up at the sky.
> (Even
> easier would be to camp there and go outside at first light.) Murrelets
> can
> be seen flying above treetop level as they circle or commute between nest
> trees and ocean. Yesterday the show began about 5:15 AM and was over by 6
> AM. We saw about 20 birds flying in ones and twos, though some may be
> have
> been seen multiple times as there was a lot of circling flight. Despite
> quiet conditions we did not hear any vocalizations, which possibly
> indicates
> the nest trees are nearby.
>
> ______________________
>
> Rebecca Cheek
> Hwy 101 six miles south of Newport
>
>
>
>
>
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>
> ------------------------------
>
> Message: 15
> Date: Mon, 17 Jul 2006 10:35:44 -0700
> From: Bryce.Sandy at epamail.epa.gov
> Subject: [obol] peregrines
> To: obol at lists.oregonstate.edu
> Message-ID:
> <OFD431E89B.709845F9-ON882571AE.005FBE31-882571AE.0060A814 at epamail.epa.gov>
>
> Content-Type: text/plain; charset=US-ASCII
>
> Hi OBOL,
>
> While eating lunch and taking in the panorama on top of Ollallie Butte
> (7200 ft. peak just north of Mt. Jefferson) Sunday, Lynne McAllister and
> I were entertained by a pair of peregrine falcons doing acrobatics in
> the high wind. They flew formations together, tumbling occasionally
> talon to talon, shrieking, and then zooming off. At one point they both
> swooped past our heads at eye level from behind giving us a bit of a
> shock. Clearly showing off!
>
> Sandy Bryce
>
>
>
>
>
>
>
>
>
> ------------------------------
>
> _______________________________________________
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> obol at lists.oregonstate.edu
> http://lists.oregonstate.edu/mailman/listinfo/obol
>
> To unsubscribe, send a message to:
> obol-leave at lists.oregonstate.edu.
>
> End of obol Digest, Vol 33, Issue 17
> ************************************
>
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