The link for the lumpy warbler photo isn't working (thanks, Fritzie!)
sohere's http://www.avibirds.com/html/Hooded_Warbler.html one that
does, and here's
http://1.bp.blogspot.com/-TCWSQn8YsY8/UALj6WpH8kI/AxA/nRUwfdn2pP8/s1600/BP+Hooded+Warbler+E.jpg
another!
On 5/14/2013 9:03 PM, Alicia Plotkin wrote:
Hi,
Many hooded warblers are sleek little birds, looking much like this
http://www.greglasley.net/hoodedwarbler.html.
A couple days ago, I was watching the local male signing, and he had a
distinct hump on his back, like this
http://www.lilibirds.com/gallery2/v/warblers/hooded+warbler_001/hooded+warbler+2.jpg.ht
only even a bit more pronounced. It was a warm day, before the
weather turned, so there was no thermal reason for him to be fluffing
out his back feathers, and it seemed no different in size during or
between bursts of song. Photos on the internet show some other males
with similar bumps or humps, and some without.
So does anyone know what's with the hump? Is this a fat deposit?
(This male has been back on territory since May 5th, but I don't know
how long it would take him to replenish fat reserves, or if there
would be a concentration of fat on his back.)
Alicia
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