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to Cobirds
Hi folks,
I would greatly appreciate anybody's explanation of how to identify immature hummingbirds in our area. In particular, I'd like to learn how to separate immature Broad-tailed and Rufous Hummingbirds. I've studied Sibley and browsed the web, but can't find much to help me feel confident.
Thanks!
Richard Trinkner
Boulder
eugene...@gmail.com
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Aug 21, 2020, 1:42:59 PM8/21/20
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to Colorado Birds
I've had this same question and a lot of time at home lately to study and photograph our local hummers (which are only Broad-tailed and Rufous with the rare Calliope). Evidently the only sure way is to photograph (or hand-hold certified if you are a hummingbird bander) the bird to see its flared tail. Eye-ring feathers can be very helpful (white for Broad-tailed and buffy, brown or rufus on Rufous). Throat pattern might also help, especially with juvenile male vs female, but there is a lot of variability. Check out Sheri Williamson's Flickr page
https://www.flickr.com/photos/tzunun/galleries/with/72157628212647729 and web page
http://fieldguidetohummingbirds.com/