They can be quite clever. I live on a 16 acre place with lots of undeveloped area to the rear. So there are lots of squirrels. I never shoot them unless it becomes absolutely no other option. I like seeing them run around. They raid my sweet corn in the garden each year so I just plant a bit more , some of it goes to waste anyway, so not upset at them.
However we feed the birds in the Winter also and we have one of those bird feeders that when the squirrel finally manages to sit on the rail, it moves down and closes off the feeding ports. So several of them figured out they could jump about ten feet and land on the feeder and the shock of the landing will knock bird seed to the ground, then they simply jump down and have a feast. I have seen them do their jump three or four times until they are happy with the seeds on the ground.
I have seen them carry some fairly large dead sticks and branches up a tree to build a nest with. Then they weave a few thousand leaves in and create a house.
I would not put it past a squirrel to carry that stick up there, animals are smarter than we credit them with, Loki our cat opens doors, when he was younger we had child locks on all the cabinets and drawers to keep him out of them.
Animals can be very clever.
Kit