[obol] anna's tail singers?

[rich armstrong]

1. there ia a short article in science news (aug 25) on anna's hummingbirds
2. researchers seem to have determined that some of the male anna's most 
dramatic noises are NOT vocalizations, but noise from whipping their tails 
through the air.
3. they studied anna's mating dives. the loud squeak was determined to be 
caused by the tail.
4. since most of us see anna's all year round i thought obolites might find 
this interesting.
Rich Armstrong
541-753-1978