The long-tailed weasel is relatively unspecialized in habits. They climb readily and skillfully. They are active on the surface of the ground and follow the burrow systems of fossorial animals such as gophers and mountain beavers. Weasels seen in the wild rarely exhibit fear of man but rather are curious and apt to watch his actions. Weasels are also often hit by cars and the number so killed seems to me to be out of proportion to their actual numbers. In moving on the surface of the ground the weasel arches its back and contracts the body until the four feet are rather close together. When the long neck and small head are held upright the animal presents a surprisingly giraffelike appearance. When climbing, the long, slim body has a snakelike appearance. A weasel travels swiftly and erratically in a series of bounds and seems always to know where the next hole is situated. The weasel has been accused of killing birds and doubtless does so when opportunity presents itself. However, in Washington I have no actual evidence of its killing birds other than domestic fowls. At Republic, Ferry County, a companion and I saw a weasel enter the burrow of a ground squirrel (_Citellus columbianus_). The following day we returned to the area. The weasel was not seen but a ground squirrel dashed into the hole at our approach. Seemingly the ground squirrel had eluded the weasel. At Conconully, Okanogan County, we set a number of gopher traps in an alfalfa field. The following morning an adult male long-tailed weasel was found in a trap but not a gopher was taken. Near Moses Lake, Grant County, an adult male weasel was caught in a gopher trap, but no gophers were taken. At Shelton, Mason County, 50 gopher traps were set. At daylight the following morning the first trap visited was found to be pulled into the burrow. When a gentle tug was given the wire fastening the trap, a decisive jerk at the other end showed that the catch was alive. If trapped gophers that pull the traps back into their burrows are pulled out by main strength, their skins are often torn and damaged. Therefore an attempt was made to reach into the burrow and pull back the sod. An adult female long-tailed weasel promptly fastened its teeth into my forefinger and clung on, bulldog fashion, to be lifted into the air with the attached trap swinging. When the left hand was used to force the animal to release its grip, it fastened onto the left thumb. With right thumb and forefinger I forced it to release its grip, but was unable to elude its teeth which again fastened to my right forefinger. Only by laying it on the ground and crushing its chest with my foot could I free myself from the vicious little beast. No gophers were taken in traps set less than 150 feet from where the weasel was trapped. In the three instances mentioned above, weasels had seemingly killed all the gophers in their immediate vicinity. As regards the gophers near