An animal trap includes: a bait, a support, and an elastic band, wherein in a set state the support supports the elastic band in an expanded state, and wherein removal, consumption or destruction of the bait by an animal: causes the elastic band to contract around the animal to kill the animal; or causes the elastic band to drive a kill mechanism to kill the animal. Animal traps may be formed substantially or entirely of biodegradable materials. Animal traps may be adapted for aerial distribution. A trap dispenser may dispense traps as they are triggered.