Like people, vultures get set in their ways and have fewer friends as they age

Young griffon vultures move frequently between sleeping sites in different locations, interacting with many friends. They get set in their ways as they age and roost in the same spots with the same individuals; older vultures follow the same paths. Roosts act as information hubs; older vultures may have a more thorough knowledge of where to find food resources and less need to learn about them from other vultures.