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Rock , log or brush piles provide cover for reptiles , ground squirrels , birds and insects . Many beachfront property owners , accustomed to high water levels and sandy beaches , resent the intrusion of vegetation and accompanying insects , amphibians , reptiles and waterfowl that form a wetland ecosystem . Food Curlews eat a variety of foods such as crustaceans , grasshoppers , spiders , lizards , centipedes , snails , small frogs , small reptiles , ground beetles , crickets , caterpillars , seeds and small fruits . In mammals these cells do not regenerate , although in many other vertebrates , such as birds and reptiles , regeneration does occurs through the stimulation of the surrounding supporting cells to divide and transdifferentiate . A large number of species use prairie dogs , their burrows , and the habitat they maintain for food and shelter , including rare and protected species such as burrowing owls , kit and swift foxes , black – footed ferrets , tiger salamanders , in addition to innumerable bird , reptile , carnivore , rabbit and rodent species . Forests also provide habitat for untold numbers of mammals , plants , insects , amphibians , reptiles , algae and bacteria .