im pretty sure even if ur bowhunting squirrels, you also have to be wearing orange, cause its small game, and small game req 200 inches of blaze.
as for the airgun question, I have 2 things to say: number one, wether you are talking about an airsoft gun or bb gun, if you are caught doing this you can be fined or jailed for animal cruelty. also, if your airgun is a pistol, you can be charged as if you had a REAL PISTOL which depending on usage could mean huge fines or jailtime in jersey because air pistols are considered firearms.
I am only telling you this for your own good. Ignorance of the law wont save u when you get caught