Hunting game animals with airguns is not legal in all states yet, and what you may legally hunt varies from state to state. Pyramyd AIR has an interactive map that shows what animals may be legally harvested with airguns in each state. Please check with your state and local Department of Wildlife and Fisheries to get the most up to date laws governing hunting with airguns in your area. A .177 caliber air rifle can kill pigeons, crows, squirrels, and rabbits. If you use a heavier .177 pellet with a pellet rifle that produces higher velocities it will give adequate penetration to reach vital organs to kill an animal quickly and humanely. If you're looking to hunt something larger than a rabbit, remember larger animals take more energy and deeper penetration to humanely kill them, that is why states limit the minimum caliber and velocity that can be used to legally harvest game.