John F. Kearney & Associates
Social and Environmental Research
Migration this week was cut short by the arrival of Hurricane Dorian. On the nights not affected by the hurricane, passage rates were down about 10 percent from the last week of August. The most common species was again American Redstart with
Nocturnal migration was up by 43% in the number of flight calls per night and 42% in the number of estimated birds per night over the previous week. Total flight calls and estimated birds were twice the number recorded for the same
The density of nocturnal migration nearly doubled over the previous week. Flight calls increased 81% to 3,724 and total estimated birds by 90% to 2,344. The most common migrant was Magnolia Warbler with an estimated 326 birds. Chestnut-sided Warblers were not far
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
My full-scale monitoring of nocturnal migration for the autumn of 2019 began on the night of 15 July 2019 at my usual monitoring station at Beaver River. This site, while only a couple of hundred meters from the coastal ponds, had just
Early Shorebird Migration Monitoring. For six days this week, I set up an AudioMoth microphone and recorder at the edge of Sandyland Ponds in Beaver River. This microphone does not reach as high into the sky as my regular, highly directional microphone
Nocturnal migration diminished throughout the first week of June to almost no activity by the end of the week. The most common bird was the Common Yellowthroat (11 estimated birds). Among the late arrivals were Canada Warbler (2 estimated birds) and Common
As to be expected in this last week of May, nocturnal migration was the most intense of the entire spring season. The biggest night was 27-28 May when an estimated 70 birds flew past the monitoring station. While these numbers would be