Aspen trees have the widest range of any tree in North America. They are very important to the forest ecosystem, as they are usually the first trees to grow after a forest fire. Known for their bright golden-yellow leaves in autumn, aspens provide valuable forage for deer and elk, while the underlying plants provide food for mice, rabbits and voles. In turn, these small animals attract bobcats, coyotes and mountain lions. Around ponds and streams, beavers usually eat aspens before any other trees.