Heat Waves Impair Animal Cognition, Research Shows

Research on southern pied babblers in South Africa found that extreme heat hampers the birds' problem‑solving abilities, causing them to repeatedly peck at a barrier instead of finding a simpler route. The study adds to a growing body of evidence that high temperatures disrupt animal behavior: birds spend less time foraging, dogs are 10% more likely to bite on hot days, and chamois in Italy become more aggressive as vegetation declines. Bees cool their brains with water droplets, while a 2025 Chinese study reported increased bites from snakes and cats in heat. “A changing climate means that your ability to behaviorally adapt is even more important,” said behavioral ecologist Amanda Ridley. Neuroscientist Clas Linnman noted, “It’s likely that both humans and dogs get stressed and more irate at higher temperatures.” Scientists warn that such cognitive impairments could cascade through ecosystems, threatening pollination, predator avoidance, and species survival as heat waves become more frequent.