Hi everybody.
How can I prevent some species from eating on my feeders (brown-headed cowbirds and common grackles).
Because of these black birds, the other birds doesn't come anymore. My feeder are becoming loosen: maybe these birds are too much heavy. They eat too much. And a lot of uneated seeds get on the ground.
My feeder is exactly as this one: http://www.boisbeckett.org/images/mangeoire3511.jpg
Thank you.
Snorkyller
Québec city











