More menu choices: Migrant orangutans learn a lot about food by watching the locals

Migrant male orangutans on Borneo and Sumatra learn about unfamiliar foods in their new home range by 'peering' at experienced locals: intensely observing them at close range. This is what an international research team found out in a long-term study with 152 male animals observed over a period of 30 years. Peering was most frequently seen when locals consumed foods that were rare or hard to process.