Zoos across North America are home to many species of animals from around the world that are not native to cold climates and, in fact, would perish if special care were not taken during the Winter months.
The most obvious consideration is temperature. Many species only require what might be considered a relatively wide range of temperatures and can be housed indoors during the Winter, in an environment controlled by a somewhat standard thermostat and heater. Some species need to be kept at a more even level constantly, with a variance of as little as five degrees Farenheit in some cases. These animals typically live in completely enclosed habitats year-round, but may still require special treatment in Winter months.
Another factor in keeping animals healthy and happy is their food, which can be affected in Winter. Animals whose habitats include edible trees and shrubs that they are used to eating in Summer may not even have leaves in Winter. Some zookeepers harvest the plant foliage in the Fall and freeze dry it for Winter feeding.
Animals that are moved inside during the Winter still need exercise, so regular exercise periods in and out-of-doors may be called for.
Enrichment is key for Wintering animals, with strategies deployed to make foraging for food more challenging and to encourage daily play.