Watching my black sunflower feeder on Sunday, I saw a WC sparrow
very aggressively takeover the catcher screen underneath the feeder.
Drove the House Sparrows out, no questions asked.
Interestingly the House Finches were allowed to stay.
Several times the house sparrows attempted a comeback
and were rebuffed.
I've never seen this behavior before.

I wanted to shake the guy's wing, but restrained myself
from scaring him off.

Douglas Daily, Patricia Federighi, Bargello
Northgate, Seattle, WA
mailto: dfdaily at juno.com