Date: 12/19/19 7:12 pm
From: Ted Floyd <tedfloyd57...>
Subject: [cobirds] CBC flickers
Hey, all. I've been enjoying the CBC write-ups. Please keep 'em coming.

Say, just a gentle exhortation here about flickers. Hybrids (or
"intergrades") are legion, and pure Red-shafted and Yellow-shafted flickers
are difficult to document in the field along and near the I-25 corridor
where so many CBCs are centered. First-generation ("F1") adult male hybrids
are relatively easily to recognize as such, but others--females,
hatch-years, and those pesky backcrosses--are considerably more difficult.
I am increasingly persuaded that perhaps we can't say "Yellow-shafted" and
"Red-shafted" for a great many of the birds we see in the field.

On the Wed., Dec. 18, Fountain Creek CBC, the two flickers I saw reasonably
well were hybrids. One was obvious. This guy:

[image: hybrid flicker 1106 small.png]

Another, perhaps an F2, was less obvious:

[image: hybrid flicker 0905 small.png]

Both of these are adult males. Would I have recognized them as hybrids if
they were females, or hatch-years, or hatch-year females? Or hatch-year
female backcrosses?? I'm not at all confident of that proposition.

Bottom line: I think we should use "Yellow-shafted" and "Red-shafted"
pretty sparingly, at least east of the mountains.

Merry Christmas to all of you!

Ted Floyd
Lafayette, Boulder County

You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+<unsubscribe...>
To view this discussion on the web visit<0f59bddf-0c1c-4e8c-9b86-48d06c858072...>

Join us on Facebook!