I spent a really entertaining afternoon at Lighthouse Point in New Haven, CT today, where 2,140 migrating raptors were tallied. The bulk of the action came thanks to 1,640 Broad-wings, a very strong coastal number. We had kettles all afternoon thanks to a brisk NW wind pushing these ridge-loving birds all the way to the shoreline. Other than the broadies, we enjoyed decent numbers of your typical September migrants. Five species of swallow were also tallied among other diurnal migrants.
Perhaps the most interesting sighting of the day came in the form of eight southbound "white-cheeked" geese of greatly varying sizes.
What the heck do you do with these???
That is no illusion; the size difference is as drastic as it appears. How many Canada and how many Cackling (if any)? Nobody had the guts to try to put a name to any of these, but I'm assuming the tiniest birds are either Cackling or parvipes Canada.