Callis Bridge sewage works - 7:00 - 8:00pm

Amazing site tonight, with a large gathering of hirundines. Minimum counts of

- 450 swifts
- 110 swallows
- 140 house martins

They all melted away suddenly at 7:50pm. I thought they would attract a raptor, but nothing in the time I was there.

Also, 12 pied wagtails, 9 of which were juvenilles