Hey check out this site. Depending on airgun you can kill alot of things.
http://home.comcast.net/~pelletgunn/air.htm

Thanks for that link.

Would 1,000 FPS kill a squirrel?

that will kill arabbit, squirrel, groundhog, gopher, robin, chipmunk, and turkey among others.so yes, it will in fact kill a squirrel. assuming you make good shots to the upper torso/head area. i doubt that would kill a squirrel if shot in the rear.there are those freak instances where something doesn't go right. i've shot a chipmunk from 5 yards away in the side of the head with a .22 and had it RUN away only to be shot in the heart and continue to limp away. after that i shot it in the back and it eventually died. just goes to show that not everything goes according to plan.

Hm. That's odd.

It's illegal to kill songbirds in most states , check your game laws before doing anything .

A couple of points to keep in mind. Be wary and mindfull of your neighbors, last year one called the cops on me when I was in the back killing pigeons who were crapping all over my tomatoes. The boys in blue showed up with their pistols drawn because they were told that some nut was outside shooting a gun randomly. I almost spent a few nights in jail but I convinced them it was only a pellet gun and I was only doing pest control.
Some birds are easier to kill than others. Robins are pathetic, they can be killed flat by spitting on them. Pigeons are tough little birds, you need a head or spine shot to drop one. A pellet in the belly will eventually kill them but it takes a while. Squirrels are suprisingly tough. I find them harder to kill than possums. Skin one and you'll see why, nothing but bone and mussle. I prefer to use .22LR's or #4's in a .410 shotgun.
If you do use a .22LR and worry about your neighbors getting upset about the noise then go with the subsonic rounds. They're dirty little rounds but in a rifle length barrel make very litlte noise.

man.....this kid just wants to whack anything in his backyard with his pellet gun it sounds like...........

Yes with 1000 fps you would drop a squirrel right there right then... all you need is a 200 fps (by the way fps means feet per second) but you also need a good shot because you dont want a injured animal in the wild... i know 200 fps will kill a squirrel because i killed one with a lung shot (squirrel is the best meat ever)

This has to be the dumbest question of all times.