Mexico City's zoo cools off bears with fruit popsicles amid heatwave

Jerry, a Spectacled Bear at Mexico City’s Chapultepec Zoo, has been enjoying a special treat to beat the heat. During a recent heatwave, keepers offered him a frozen fruit popsicle—part of the zoo’s long-standing efforts to protect animals from rising temperatures. The practice isn’t new, but it’s becoming more vital as climate change reshapes natural cycles for many species. The popsicle given to Jerry was made from apple juice, mango, grapes, carrots, and water. Veterinarians and nutritionists at the zoo design these treats carefully, tailoring each one to the dietary needs of different animals. Beyond just cooling them down, the popsicles encourage natural behaviours and keep the animals active.

Zoo staff also monitor how animals respond to these enrichment activities using ethograms—detailed records of behaviour. Alberto Olascoaga, the zoo’s director, has overseen this approach for more than 20 years. It’s not just about frozen treats, though. Enclosures are equipped with shaded areas, cool dormitories, and varied surfaces to help animals escape the sun. Animals with thick fur, such as bears and big cats, receive extra attention during extreme heat. The zoo’s methods aim to mimic natural cooling behaviours while ensuring the animals remain comfortable and engaged.

As temperatures climb, Chapultepec Zoo continues adapting its care routines to support its residents. The frozen treats, shaded spaces, and behavioural tracking all play a role in safeguarding animals from heat stress. With climate change altering seasonal patterns, these measures are likely to remain a key part of zoo management.