Re: [cobirds] Gray Vireo singing from the nest , Mesa County

John et al,

The Peterson Field Guide to Bird Sounds says that female Gray Vireos are known to sing occasonally, but usually only a few phrases at a time. Birds of North America says that both sexes of Gray Vireo alternate egg-sitting duties during the day. So I'm not sure it's possible to say whether your nest-singing bird was a male or a female.

Cool sighting.

Nathan Pieplow

Boulder

On Wed, May 27, 2020 at 4:54 PM 'John D' via Colorado Birds <cobirds@googlegroups.com> wrote:

CO Birders :

While visiting my son in New Castle this past weekend , I took the opportunity to do an early morning visit to Cameo and Coal Canyon in Mesa county before it got too hot and the motor bikes and ATV's started up.

I did get to see and photograph Chukar my target bird , male and female , they seem to have moved much further up Coal Canyon than previous years , probably because of the active shooting range in the lower part of the Canyon.

And I did find a Gray Vireo nest in juniper in Coal Canyon , took me over half an hour to find it , could hear the bird singing but just could not see it despite being only 6 feet from the sound . So eventually I found the nest and the bill of the vireo just poking above the rim of the nest . My question is what sex was this bird , can both male and female vireos sing the same song from the nest ?. It was singing the same song as on Sibley.

John Drummond

Colorado Springs 

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