I haven’t had any bluebirds but there was a feral chicken that hung out with a stray cat in my front yard. The would sit about four feet apart sunning themselves.
Bluebirds seem to be pretty nasty little things.
I’ve only seen two, and both times they were attacking something.
[Other time was a cat the bird was after.]
Feral chicken and a stray cat.
Hmm.
Obviously they were up to something, looking, waiting.
“When the human goes to sleep, then we’ll strike!”