Central Park 9/17

After what was reported to be a fairly good migration on Friday, Saturday was quite slow. A few warblers in a few pockets, the most interesting of which was a Pine Warbler. Raptors didn't put in much of a show either: 3 Ospreys and an Accipter sp as well as three local Red-tailed Hawks.

Osprey
Northern Flicker
Eastern Wood-Pewee
Blue-headed Vireo
Red-eyed Vireo
Veery
Swainson's Thrush
Northern Parula
Magnolia Warbler
Black-throated Blue Warbler
Pine Warbler
American Redstart
Common Yellowthroat
Scarlet Tanager

Although what was by far the most interesting bird was actually an unidentified one. A small active vireo in the Maintenance Field rang internal alarm bells on the grounds of "potential Philadelphia". This has a troubling overlap with immature Warbling in fall, and this individual was too far away and not giving easy looks. What was evident was that it was almost warbler-esque in activity and looked a little small. However the definitive ID points for Philadelphia were absent - it was not yellow from throat to breast and it didn't have an evident dark mark between eye and bill. I decided "Warbling" at the time based also on a single buzz call, but most vireos sound the same and in retrospect I'd be tempted to call it a Philadelphia Vireo but frustrated at not being sure about it. Quite a few other Philadelphias from other locations make me especially curious about this bird.