Nocturnal migrants October 7th 2012

A strong cold front led to a good flight, with many White-throated Sparrows and good numbers of Gray-cheeked Thrushes, but the highlight of the night was a Least Bittern call at 4.06am (Elkins Park, PA).













The lower calls here are Gray-cheeked Thrush and the higher calls presumed Bicknell's Thrush (3.53am).
Gray-cheeked Thrush










Bicknell's Thrush








Note the straighter contour with the peak at the beginning of the slope