A closer look at the North Seattle Black Swifts of June 15 and 16.

16 North Seattle Black Swift locations were eBird reported June 15, 2020. These represented 486 BLSW.
12 North Seattle Black Swift locations were eBird reported June 16, 2020. These represented 234 BLSW.

North Seattle is usually good for 3 or 4 sightings and less than 10 BLSW the entire month of June. Last year it was 4 and 9.

I figured their migration should be over mid-June. Apparently not.

What were they doing? Catching flying ants? Do flying ants fly on rainy days?

Where did they roost? The Colorado guys who got the data off 3 Black Swift geolocators say migration roosting is on steep rocky river banks. Are there any of those around? Anyone out at Snoqualmie Falls the night of 6/15? Is that place open?

Watched a couple hundred Vaux's come out of the Wagner roost this afternoon.

Good chance they will be going back in come sunset or rain, or both.

Larry Schwitters.
Issaquah