Murder like clockwork

Every night, within minutes of 8:00 pm, flock upon flock of crows pass over our house flying south, toward what must be a very large roosting ground near downtown. It starts with a few birds cawing and soon turns into a swarm of black as hundreds of birds silently flap past. Wave upon wave of birds come over the rooftops to the north and swoop past the tree line to the south, on to their nightly endeavors. This lasts for about fifteen minutes, after which the air clears, the sun sets, and only the occasional late straggler caws en route to the gathering.

The pictures really don't do it justice.

All taken from our back porch in Queen Anne - July 26, 2007 (click images to enlarge)