Early migrants erupted over Beaver River this week. While the week began slowly, during the two nights beginning on 13 and 14 August, there was a steady of stream of migrants from about an hour after sunset to an hour before sunrise.
There was a good combination of shorebird and warbler nocturnal movements this week. True migration seemed more apparent among the warblers. The two most common warblers were Black-and-white Warbler (an estimated 58 birds) and American Redstart (56 birds). The next two most
Nocturnal migration during this last week in July poses a number of interesting questions about the migration that takes place in mid-summer. By late July, peak migration for some shorebirds species is well underway. Beaver River is not a significant stop-over area