If you are outside during a mild break in the winter weather, and near a pond, you may hear what sounds like dozens of nylon-toothed combs being strummed erratically. Chances are that you are hearing the mating sounds of the little (1 1/2 inch) western chorus frog. If you happen to find one and can look at it closely it will be greenish brown with 3 dark stripes (sometimes broken-up) down its back. You will also notice that its upper lip looks as if it is painted white, and its feet have little webbing but have definitely rounded toe ends. They are terrestrial, but will not hesitate to jump into the leaves, grasses, or water to escape your grasp.
This little amphibian is known to be a good indicator species, since it is sensitive to various pollutants.
In addition, their presence in large numbers, represents a much-welcomed help in insect population control.