How do you get a critter out of a tree? Advice needed.

[mdoyle]

We had a pair of nasty black birds building a nest in our bar-be-que grill, I'd clean it out and the next day they'd have it filled again. There was no easy spot to put wire mesh since the whole bottom was open along with the back and sides of the hoods.

I finally took my carbide cannon, loaded it, and stuck it inside the hole where the spit goes through and BOOM. The birds stumbled out of there and never came back.