Bobcats are very fond of lurking round prairie-dog towns as soon as the prairie-dogs come out in spring. In this part of Colorado, by the way, the prairie-dogs were of an entirely different species from the common kind of the plains east of the Rockies. We found that the bobcats sometimes made their lairs along the rocky ledges or in holes in the cut banks, and sometimes in thickets, prowling about during the night, and now and then even during the day. We never chased them unless the dogs happened to run across them by accident when questing for cougar, or when we were returning home after a day when we had failed to find cougar. Usually the cat gave a good run, occasionally throwing out the dogs by doubling or jack-knifing. Two or three times one of them gave us an hour’s sharp trotting, cantering, and galloping through the open cedar and pinyon groves on the table-lands; and the runs sometimes lasted for a much longer period when the dogs had to go across ledges and through deep ravines. On one of our runs a party of ravens fluttered along from tree to tree beside us, making queer gurgling noises and evidently aware that they might expect to reap a reward from our hunting. Ravens, multitudes of magpies, and golden and bald eagles were seen continually, and all four flocked to any carcass which was left in the open. The eagle and the raven are true birds of the wilderness, and in a way their presence both heightened and relieved the iron desolation of the wintry mountains.