Abe Posted August 20, 2019 Share Posted August 20, 2019 Saw this bird in Calgary, AB, Canada, Aug 19, 2019. Philadelphia? Warbling? Quote Link to comment Share on other sites More sharing options...
Sean C Posted August 20, 2019 Share Posted August 20, 2019 Warbling Vireo 1 Quote Link to comment Share on other sites More sharing options...
akandula Posted August 20, 2019 Share Posted August 20, 2019 8 hours ago, Sean C said: Warbling Vireo I am really not sure. Assuming the yellow is not due to the light, there is way too much yellow on its underparts. Also, this individual has a more distinct face pattern than Warbling, and there is a lot of yellow on the primaries. However, if you see the throat in picture 1, it is yellow, but in picture two, it is mostly white due to lighting. If this also happens with the rest of the body, this might be a Warbling. Like in the second picture, the brightest yellow is in the flanks, not the throat. These two species show so much variation that I think it is better to wait for more opinions. 1 Quote Link to comment Share on other sites More sharing options...
RCD Posted August 20, 2019 Share Posted August 20, 2019 I believe that one differentiator is the dark line through the eye. Philadelphia goes all the way to the bill while the line on a Warbling tends to get paler as it approaches the bill. That said, it is subtle and tricky for these photos. The first photo would suggest Warbling to me but more input is needed from those who regularly separate these species in the field. 1 Quote Link to comment Share on other sites More sharing options...
John Landon Posted August 20, 2019 Share Posted August 20, 2019 1 Quote Link to comment Share on other sites More sharing options...
John Landon Posted August 20, 2019 Share Posted August 20, 2019 This was taken 10 days ago , one of a family of Warbling that I have followed all season, through mating, nesting and fledging. Just for comparison. 1 Quote Link to comment Share on other sites More sharing options...
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