A first for mammals: Tropical hibernating

Madagascan fat-tailed dwarf lemurs hibernate during the winter, even though daily temperatures often top 30°C (86°F).

WINTER HEAT. A Madagascan fat-tailed dwarf lemur can use bad insulation in a tree to its advantage during hibernation. Dausmann

The lemurs (Cheirogaleus medius) are the first tropical mammals, and the first primates, found to hibernate, Kathrin H.