Large constrictors including pythons and anacondas are kept in zoos and private collections worldwide, with welfare challenges related to space, thermoregulation, and feeding that require specialist knowledge.
Large snake welfare is poorly understood by many private keepers and some zoo facilities. The thermal biology of these ectotherms means that inadequate temperature gradients compromise every physiological system, including digestion, immune function, and reproduction. A snake kept at incorrect temperatures is in chronic suboptimal welfare even if externally appearing healthy. Space requirements for large constrictors are substantial; a snake must be able to fully extend and thermoregulate along a gradient that a small vivarium cannot provide. Zoo standards for large constrictor housing have improved substantially, but private ownership often involves inadequate facilities. The exotic pet trade in large constrictors creates welfare problems at the level of individual animals and biosecurity risks when animals are released or escape.