well fly blackbirds,grackles,starlings are considered nusience birds shot up a bunch with a federal warden one year,he said "no worries" not protected.But this was in nebraska so maybe different laws applied?
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Guy,as stated above stay away from brake barrel as every couple shots things move,I switched to a daisey bb/.177 pellet ver acurate but when a family of wood chucks moved in to my back 40 and messed up my pup I needed more horsepower to kill the somebeeches,.22 ruger long rifle shooting 55gr sub sonic 120fps rounds really did the trick no 22 crack with sub sonic,bullet travels below speed of sound,killed 9 chucks last summer 7 the year before,all clear now,well so far.For blackbirds .22 might be over kill but the daisey does the job just fine,holds 50 bb's or load pellets one by one eith was it kills birds just fine.
Like crows "about to do damage" kill em all I read the same thing about crows doing or about to do damage they can be shot,for crows I read something about crows being the nat'l bird in mexico and they fround on us killing they're bird year round,not sure if its true or not but thats why we have a crow season.
also "cow birds" have shown up lately another fun bird to shoot as they sit tight and allow you to pick em off one by one.