Animal life ( from N.American desert )

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The North American Desert harbours an abundant variety of insects, including grasshoppers that occasionally reach destructive proportions. Lizards, snakes, and other reptiles, the most conspicuous animals, are dependent on plant fluids or devoured animals for moisture. Likewise, desert birds are largely independent of water sources (and are seen almost everywhere), as they derive their moisture from the insects and spiders that they eat. Rodents (including mice, rats, and squirrels), rabbits, and bats are the most numerous mammals; essentially nocturnal, they remain underground during the heat of the day and, like the birds and reptiles, obtain moisture from their food. Higher up in the food chain are such carnivores as coyotes, bobcats, foxes, and skunks; and the largest desert mammal, found at higher elevations, is the bighorn sheep. Protective coloration, often remarkably complex, is an important feature of desert life.

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