A call stack is used for several related purposes, but the main reason for having one is to keep track of the point to which each active subroutine should return control when it finishes executing.
Though they are commonly mistaken for rodents due to the similarities they share with ground squirrels and marmots, moles are actually mammals. Eastern Mole. The most common mole in the United States is the eastern mole. Adults are typically about half a foot long with sleek, dark fur, long snouts, wide hands, and obscured eyes.
Voles take over abandoned mole and gopher tunnels and also eat roots, bulbs and tubers along the way. Voles can be mistaken for a gopher because a full grown vole will be about 3â long. Their fur can be dark brown and resembles a mature gopher, but unlike gophers, voles have mouse-like ears.