There are photos of two Black-throated Green type Warblers (not just one) at Two Buttes Reservoir over that weekend. One male and one female.
Brandon Percival -- Pueblo West, CO ________________________________ From: Steven Mlodinow <[email protected]> To: [email protected] Sent: Sunday, November 10, 2013 3:45 PM Subject: [cobirds] May 2013 Two Buttes BT Green Warbler Greetings All > > >Tony Leukering and I were reviewing photos for this spring's North American >Birds' column and happened upon a surprise. > > >Upon studying photos of this May's Two Buttes Black-throated Green Warbler, it >became apparent the bird is actually a Black-throated Green x Townsend's >Warbler hybrid. The range of these two species approximate each other closely >in NE British Columbia and may (in reality) overlap. Features of this bird >pointing towards hybrid are > > >1) Yellow below black chest >2) Darker than normal cheek patch >3) Streaking on the undertail coverts >4) And more streaking than normal for Black-throated Green on back > > >I understand -- the bird had the typical black throat patten of a BT Green. >When I saw that classic throat pattern, I didn't look much further... >especially with GC Thrush, Philly Vireo, Cape May Warbler, Summer Tan, BTB >Warbler and an abundance of other rarities in the vicinity. > > > A rather similar bird was seen on the Texas Coast in April 2011 and is widely >considered to be a Townsend's x BT Green Warbler. The video can be seen at >http://www.youtube.com/watch?v=9SLSsfB7GcI > > >Some have suggested that this cross may be more regular than thought. There >have been two sightings of probable Townsend's x BTGN Warbler in CO >previously, but without photographs. > > >For an excellent photos displaying most of the above marks, go to: >http://www.pbase.com/gwalbek/image/150130138 In any case, note that the Two Buttes bird will be considered a hybrid on eBird.... so feel free to change your list to such, but Black-throated Green Warbler will not be considered a valid ID for that bird. In reality, it was something far more marvelous... just wish that I'd realized it at the time. Good Birding Steve Mlodinow Longmont, CO -- -- 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 [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/1384198560.2274.YahooMailNeo%40web164705.mail.gq1.yahoo.com. For more options, visit https://groups.google.com/groups/opt_out.
