Hi folks,
While not CO birds, I thought folks might enjoy some raven photos from
early January, taken a short distance south of the CO-NM border north
of Espanola, NM (and a few other CO birds, just for good measure!).
http://picasaweb.google.com/Paul.J.Hurtado/NMAndCOSanLuisValleyJanuary2010#
I had originally thought the Ravens were Chihuahuans based on higher
pitched calls, finishing with slight inflections -- but having finally
looked through the photos it isn't clear that at least some of these
weren't actually Commons instead. (I'm kicking myself for not
bringing my recording equipment down there! Argh!)
Anyway, while I'm trying to un-confuse myself, I'd love some feedback
on whether the following characters on these birds seem within the
rage for either species: (1) bill length, (2) "bristle" length along
the culmen, (3) tail shape.
Judging from eBird data, this area could have both species. I was
reasonable certain I saw/heard both while I was down there, though I'd
gladly change my mind if I was making Commons out to be Chihuahuahs!
Good birding,
Paul Hurtado
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