Scientists tracked 21 oilbirds in Venezuela, and five disappeared from their cave for up to 73 days to stay closer to food
PC: Alastair Rae/ Wikipedia Oilbirds spend their nights flying through tropical forests in search of fruit, but some of them take an unexpected approach to reach their feeding grounds. Some birds regularly returned to the same main cave after feeding. Others made long-distance trips but returned to the cave within three days. A third group … Read more