I know I'm walking into a very obvious trap, but I have to add this correction for my own sake.
It isn't a pigeon, but a parakeet. A small parrot species that can be very articulate. This one is most likely a male that didn't bond with a female parakeet, thanks to its high aptitude of speech copying and friendliness towards humans.
P. S. The silhouettes are kinda drawn scary, but it could be Kana with Karen considering they were both introduced at the same time and gay nurseXgymteacher is a pretty common trope.
My uncle’s budgie loved to mimick the sounds of keys turned in the lock, opening and closing the front door and then footsteps in the hallway. In that order. In the middle of the night. So yeah, they can.