And dusky-footed woodrats begin to stir from their complex houses of interwoven sticks and leaves, in search of food and more plant material to add to their houses. The season you visit Cold Canyon is as important as the time of day for observing particular species of vertebrates. Many more bird species are active during the spring and summer than in other seasons, and your chances of seeing rare birds occur during the early spring and fall migrations. Reptiles depend on the warmth of sunshine, so most are active in late spring, summer, and early fall. However, most amphibians require moisture, and as a result can be easily observed only in late fall, winter, or early spring.
Mammals are present year-round, but many are inactive through the winter.
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