Why are ravens attacking my patio furniture?

Question

the ravens have been attacking or biting the tops of my patio chairs. the chairs are on my deck under an umbrella. we have noticed that there were more ravens hanging around. also, i haven't seen squirrels in awhile if that is a sign. I maybe wrong, about it being the ravens but that is what i believe has been attacking the chairs.

Answer 1

If there are a lot of them, it is more likely crows than ravens.  Crows go in a flock (called a murder) and ravens go in pairs.  Crows make a harsh CAW sound; ravens make a gentler croak.  Ravens are bigger too.

They could indeed be eating young squirrels or otherwise driving squirrels away, as they are somewhat predatory (crows and ravens both).

I don't particularly know why they would attack your chairs unless 1) they are trying to get some threads off to line their nests, or 2) they find them intriguing and like to play with them.