My bird feeders are called the Squirrel Buster and are squirrel proof with a mechanism that closes the feeder ports should a squirrel happen to get on one of them. That does not deter the squirrels from constantly trying to get to them. Sunday morning I looked out and one of the squirrels was poised on top of the pergola keeping an eye on the feeder beneath it. I was able to open the patio door and take photographs without scaring it away because it was so focused on trying to get to the feeder that it didn’t seem to notice me in the doorway just a few feet away. Taken with the Nikon Z9, Nikkor Z100-400mm and ZTC 2.0.