[IDENTIFICATION HELP] What are these droppings?

After i clean it it returns slowly. There is pigeon poop on the outside of the windows, not sure if this is related.

https://preview.redd.it/pgnlz9gearff1.jpg?width=908&format=pjpg&auto=webp&s=f168ec44cb0aaa61f3f741b6de3839b3370d26e6

https://preview.redd.it/1yztzagearff1.jpg?width=908&format=pjpg&auto=webp&s=61945bd8a2a4e6ce506e382dce4f378590b83ccb

https://preview.redd.it/kfj4sciearff1.jpg?width=908&format=pjpg&auto=webp&s=438e738e86cd1a5ad6ea278e5ede5d08e10cfc02