Hello, This picture confirms Blackpoll Warbler to me. The solid black cap that turns into a clean white cheek looks good. Your photo picks up the slight greenish-grayish tint on the wing, below a white wing bar. Combining that with all white underbelly and undertail coverts looks good too. The back is "messy" grayish and white which is also good for Blackpoll. I'll attach a photo of a Blackpoll Warbler I photographed at Prospect Ponds on Global Big Day so you can compare.
[image: IMG_1153 (2).JPG] *The birds are happy, and so am I* *~Caleb Alons, Larimer 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/eaacecfa-42cd-4125-a209-e2fa51a6ad8a%40googlegroups.com.
