Thank you, Tony! I was looking through my pictures again tonight and found this one. Is this the white throating you were talking about for a Blue-headed Vireo? or is still missing enough contrasting with the auriculars?
<https://lh3.googleusercontent.com/-BCF33Q4rtqs/V9C_uPmm_pI/AAAAAAAAAHE/Rolh1KnHlrMdE73rBrOBF5XuiQYPHjHEgCLcB/s1600/Mystery%2BVireo%2B1.5.jpg> On Wednesday, September 7, 2016 at 9:02:35 AM UTC-6, codipper wrote: > > Joey: > > Given a view of the back, Blackburnian is actually fairly easy to > differentiate from similar-looking species by the white or whitish "braces" > -- those streaks of contrasting pale near the sides of the back. However, > your major concern with identifying Townsend's Warbler (TOWA; note the lack > of an "h") is differentiating from Black-throated Green Warbler (BTNW). > One of the obvious differences between TOWA and BTNW is the latter's > yellow-green vent strap (a complete or not-so-complete band extending from > flank through vent to flank), so nicely illustrated in your first picture. > An additional concern with these two species is that they are known to > hybridize, and Colorado has at least two records of such. I am a little > concerned by the apparent darkness of the rear corner of your bird's > auricular patch (which might suggest TOWA genes), but that could be a > posture or photographic effect. > > For the *Empidonax*, I would guess that the bird's long primary > projection and relatively shortish tail suggest Hammond's, a very different > look than that of Dusky (short primary projection, long tail) and a > somewhat different look than that of Least (short primary projection, > shortish tail). > > The vireo is, indeed, a Cassin's, as suggested by the overall greenish > coloration and the dull interface of throat and auriculars; Blue-headed > would have a bright white throat sharply and strongly contrasting with the > auriculars. > > Enjoy, > > Tony Leukering > currently Cut Bank, MT > > > Need ID Help from Crow Valley (Weld County) > <http://groups.google.com/group/cobirds/t/cfb06a32b334016f?utm_source=digest&utm_medium=email> > > Joey Angstman <[email protected] <javascript:>>: Sep 06 07:55PM -0700 > > Hi, > > > My friend (Dan Horton) and I visited Crow Valley on Monday to see if we > could find migrants that are coming through. We did in fact find some > birds, but also realized we have don't know what they are. We were able to > narrow it down a little bit, but definitely need some help with a couple > birds. Please check out the posted pictures and let us know if we were on > the right track. > > What we think we had: > 1) Townshend's Warbler (warbler pictures) > 2) Least Flycatcher (flycatcher pictures) > 3) Cassin's Vireo (vireo pictures) > > We were also having a very in depth conversation on the difference between > immature Townshend's Warbler vs immature Blackburnian Warblers. Can anyone > offer some helpful tips for differentiating between the two (other than > Townshend's being extremely more likely)? > > > < > https://lh3.googleusercontent.com/-2TOGzOVW7ls/V89_-wmijgI/AAAAAAAAAGo/dWEOC6vxiXsmbjCe_05vsY4vVdrhoGX2gCLcB/s1600/Townshends%2BWabler%2B3.jpg > > > > < > https://lh3.googleusercontent.com/-QE6fhW3w1QQ/V89_8CFfNRI/AAAAAAAAAGk/IeSzRlOlMkwOUGFs1J-Ls-kkHX-Cv3w6QCLcB/s1600/Townshends%2BWabler%2B2.jpg > > > > < > https://lh3.googleusercontent.com/-DA0DClqgQaw/V8-AUTQNr_I/AAAAAAAAAGs/siSMzCH8UGYHnbQGdz82cPzBIX-n2X8KQCLcB/s1600/Townshends%2BWabler.jpg > > > > < > https://lh3.googleusercontent.com/-I_TGe1lALlc/V89_1u5u_BI/AAAAAAAAAGg/eD07MD1pbjEkapG09am6scTlcp9FBLCHACLcB/s1600/Mystery%2BFlycather%2B1.jpg > > > > < > https://lh3.googleusercontent.com/-QviiHfqAWCM/V89_yIm43PI/AAAAAAAAAGc/SrwwcbBDEjAubBgtTDIdr4cM11nCZ08MQCLcB/s1600/Mystery%2BVireo%2B2.1.jpg > > > > < > https://lh3.googleusercontent.com/-XIR_6mMGFz8/V89_wO-sdBI/AAAAAAAAAGY/pvmHo6rwzLsL-uUXM8_I9rSj3rq0u_UqACLcB/s1600/Mystery%2BVireo%2B1.4.jpg > > > > < > https://lh3.googleusercontent.com/-Fij-dW122uU/V89_t_aKlSI/AAAAAAAAAGU/_dDJvYEwT1MKYGHCF9iBX_RYgIPtyexQQCLcB/s1600/Mystery%2BVireo%2B1.3.jpg > > > > > Thanks for all the help. > > > Joey Angstman > > Fort Collins, 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/b053c528-2c71-4c27-83da-ca85bc61896c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
