The burrows will be found from six to twelve inches beneath the surface of the ground, the usual depth being about eight inches. At irregular distances along the burrow, the animal makes a short branch passage leading up to the surface, where it deposits the dirt dug from the main passage, in the form of a mound. After the dirt is all thrown out, it closes the branch passage, packing the ground in solidly, so that the only visible signs of the burrow are the mounds of ground. There is a good reason why the animal should be so careful to keep the passage closed, for they have a number of enemies besides man. Its most dangerous enemies are, perhaps, the little spotted skunk or civet cat and the bull snake, as both of these creatures, once they get inside of the burrow, follow its course until they find their victim.
The food of the gopher consists mostly of roots of plants but they often cut the roots of fruit trees. They are particularly destructive to alfalfa, and the loss to farmers, caused by these animals, is considerable, not only from the plants destroyed by having the roots cut, but also from the plants buried under the mounds, and from the fact that the mounds interfere with the cutting of the crop. The fur is of no value, but owing to the destructiveness of the animals, land owners are very anxious to be rid of them. In many places a bounty is paid on the gopher, so that they may be profitably trapped when fur-bearing animals are of no value.
The traps recommended for the gopher are the No. 0 steel trap and some of the various choker traps made especially for this use. In setting steel traps, select the freshest mound, and by examining closely, one can usually tell which way the dirt was thrown out, and will know on which side to look for the burrow. A handy tool is a slender, pointed iron rod to use as a probe in searching for the burrow. Having located the passage, open it up and set the trap on the bottom, sinking it down until level. Cover it lightly with dirt, and close the hole by laying a small piece of board, or a shingle over the opening, covering with ground.
The trap should be fastened with a stick, and the same stick will serve as a marker, so that one can easily find the trap. A small spade or a heavy garden trowel will be needed for digging and for convenience, the traps, stakes, etc., may be carried in a large basket. The regular gopher traps, mentioned above, are more easily set than steel traps and printed directions for setting usually accompany the traps. They should be set at one side of the burrow, on a level with the bottom and with the mouth of the trap just even with the side of the passage. Just a little light should be allowed to penetrate from behind, and all other parts should be closed, so as to exclude light.
The gopher, in coming along the passage, sees the light and goes to investigate, when it will be caught in the trap. If too much light shows up, he does not go close to look at it, but immediately brings a load of dirt and proceeds to close the hole, thus burying the trap. All loose dirt should be removed from the burrow before setting the trap, as otherwise the gopher will gather up the dirt as it approaches the light, and shove it into the trap.