For example, eagles are able to spot a vole or lizard from more than 400 m away.
In kangaroo rats and some vole species, investigators have found that male brains have a slightly larger hippocampus.
Other animals found nearby included two extinct species of vole - a small rodent resembling a mouse - that were used to date the site.
An organism - say, a vole - that faces predation has, say, two alternative strategies - to dig and hide or to flee its predators.
Wildcats prey mainly on smaller animals, particularly voles , wood mice, and seabirds but they also kill rabbits and mountain hares.
The group is currently working on gaining protection for the lands and developing corridors that suit species from big cats to tiny voles .
They are nocturnal hunters and feed mainly on small mammals like mice, rats, voles and shrews.
In spring and winter, especially in the northern part of their range, they prey predominantly on voles .
A crucial twist is that not only do voles eat seedlings while mice eat seeds, but voles and mice have different food preferences.
During the breeding season, they eat mostly lemmings and voles .