Grackles, Starlings and R-w Blackbirds have been amassing at the Celery Farm in the evenings, then leaving in the morning in droves.
   But where do they go on a rainy day?
   One of the answers: my feeder.
   They arrived at 7:30 a.m. -- at least 100 of them -- and proceeded to devour every seed they could find. They were gone in 10 minutes.