A bird's perch is a place where a bird can rest and sleep. The most common perches are roosts, branches, treetops, and limbs. Roosts are typically found in trees or on buildings, and are made of sticks or twigs. Branches are the main part of a tree that extends out from the trunk. Treetops are the highest point of a tree, and limbs are the smaller branches that extend out from the main BRANCH. All of these provide a safe and comfortable place for birds to rest and sleep.