Bill The Cat
Member
I live just outside of Philly I wish I had bluebirds here but I haven't put a birdhouse up for just that reason. I know that the Bluebird society of Pennsylvania has coordinators in most counties Here is a link
http://www.thebsp.org/bluebirdcc.html
I think it is similiar to grey squirrels I don't know about mink they are endangered here I think. But rock doves starlings and house sparrows are endangering our native bluebirds and red headed woodpeckers. At this point if I ever do put up a nest box it will be for a screech owl or american kestral or maybe a flying squirrel
I haven't heard or read that Rock Doves (Pigeons) are a threat to Bluebirds. I am curious, How so?