Hi Scott,
Birds if the World says "female uses a whinny when aggressively confronting an intruding female (Morton et al. 1998) (ML140291one whinny at beginning of cut)." That reference is: Morton, E. S., B. J. M. Stutchbury, J. S. Howlett and H. W. Piper. (1998). Genetics monogamy in Blue-headed Vireos and a comparison with a sympatric vireo with extra-pair paternity. Behavioral Ecology 9:515-524. https://academic.oup.com/beheco/article/9/5/515/208896
Hope that helps,
Christine
On Saturday, July 24, 2021 at 4:11:21 PM UTC-4 scot...@gmail.com wrote:
Today I listened to a blue-headed vireo singing and calling for quite a while, hoping to get a Confirmed code for the atlas (nope), and heard a new sound. I wondered if it had special meaning.
The call started as chatter at a higher pitch than usual, rising and accelerating slightly before transitioning into a whiny descending whinny. The last part was reminiscent of a sora or, maybe, the three stooges. The whole thing took 2-4 seconds.
I've been through xeno-canto, iBird, and allaboutbirds without finding anything like it. I didn't make a recording. Does my description sound familiar?
Scott
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