Mexico City's zoo treats bears with popsicles to beat deadly heatwaves

Jerry, a Spectacled Bear at Mexico City’s Chapultepec Zoo, recently enjoyed a frozen fruit popsicle during a scorching heatwave. The treat was part of the zoo’s long-standing effort to help animals cope with rising temperatures and shifting natural cycles. The popsicle given to Jerry contained apple juice, mango, grapes, carrots, and water. Zoo staff prepare these icy snacks under the guidance of veterinarians and nutritionists, ensuring they suit each species’ dietary needs. Animals with thick fur, such as bears and big cats, receive extra care when temperatures soar.

Each animal gets one popsicle to avoid competition or conflict. The treats serve a dual purpose: they cool the animals down while encouraging natural behaviours and physical activity. Zoo staff also conduct ethograms—detailed observations—to monitor how the animals interact with the popsicles.

Alberto Olascoaga, the zoo’s director, has overseen this practice for more than 20 years. The initiative reflects broader challenges, as climate change increasingly disrupts the natural routines of many species in captivity. The popsicles provide relief during heatwaves and help maintain the animals’ well-being. By tracking their responses, the zoo ensures the treats remain both enjoyable and beneficial. This approach has become a key part of Chapultepec Zoo’s strategy for adapting to a warming climate.