all summer, there has been a flock of swallows around here: about 10 birds, criss-crossing the sky every now and then. yesterday, there were, i don't know. 50? 60? a whole sky of swallows. they kept darting through the air. i took a picture, then tried to catch a single bird in flight.
i ended up with around 20 photos of empty sky. and then, finally, i got lucky.