No, seriously, that's what it's called! Example! (That's not the brand I'm using, but it's pretty generically called Critter Crunch.) :DDD

And omg yes. The squirrels have developed this habit of jumping onto the bird feeders when their boat is empty, and since the bird feeders are squirrel-proof, they SNAP shut with a distinct CLANG. And they'll do it three or four times A DAY until I refill the boat. It's like they're saying "HEY! LADY! SNAP! GET YOUR BUTT OUT HERE SNAP! AND FILL UP OUR SNAP! DAMN BOAT! LADY!" The little BANDITS.