The Air Rifle I've had since 1985 (and still use) it an RWS 45M,
yeah, it'll do better than 1000fps with the correct lightweight pellets.
It's a spring piston "break action" (you cock it with the barrel)
and the type is one of the most popular for a damned good reason, because they work.
And while some will propose getting a 22cal air rifle "for the energy" the difference in energy is rediculous (the difference between pitiful and piointless) 177's are the way to go, velocity = flat trajectory (easier to hit with) and velocity with the proper pellets give far better penetration.
a crow with an EXIT HOLE won't move very far and most of that will be straight down.
a squirrel is a hard target to penetrate at all (they have suprisingly resiliant skin) but a 177 that gets inside can do a lot of damage.
Far more damage to them than a huge bruise.
Personally I have a bolt action 22lr that shoots flatter and hits harder while actually making less noise than my air rifle, it probably heps that the 22 rifle
has a 26" barrel... and the 40grain "pellets" it launches make exit holes in much larger "game" than a squirrel or crow.
But I live where nobody would notice a gunshot... I live 3 doors down from a high power rifle range
AD