Trees offer the following to animals: * Food (berries, bugs, leaves, nuts, and sometimes roots). * Shelter (from rain and wind, mostly, but inside tree for smaller animals and fallen trees for beavers). * Sun protection for animals or plants they eat. * Escape from predators to run up to the tree. * Travel route for trees with vines or for animals that can jump from tree to tree. Also across rivers and streams if fallen across. * Oxygen production converting CO2 into oxygen. * A place to live at. * Trees let birds nest and play there. * Trees also provide bark for house building for weasel and other creatures.