Most mammals have young born after developing inside the mother's body in a special organ called a uterus. They have an internal skeleton.Ĭlass: Mammalia (Mammals) - Mammals are warm-blooded. Gill slits and a tail are present at some point in their life cycle. They have a tubular nerve cord along the back. These animals have a notochord at some point in their development. Mammals, birds, reptiles, amphibians and fishes are included in this phylum. Phylum: Chordata - The Phylum Chordata contains the vertebrate animals. Reproduction is generally sexual, but in some animals asexual reproduction may be utilized at certain times. Most animals are capable of movement at least in some portion of their life cycle. Kingdom: Animalia - Animals are multicellular organisms that rely on other organisms for nourishment. Human fears and misunderstandings also negatively impact bats. Cave closures, habitat loss and/or disturbance (for roosting and feeding), accumulation of insecticides, intentional killing, wind turbines and diseases, such as white-nose syndrome, are all contributing factors to the reduction of bat populations. Six of the 13 bat species in the state are listed as endangered or threatened. Predators of bats include cats, raccoons, hawks, owls, shrikes, opossums, skunks, snakes and weasels. Female bats bear live young and feed them after birth with milk produced from the mammary glands until they are able to hunt on their own. Mating occurs in late summer or fall with fertilization delayed until late winter or spring. Their wings are made of the skin of the arm, hand and fingers. Bats are the only mammals with true flight. Because insects are not available year-round in Illinois, bats must hibernate, migrate or adjust their activity in some manner to survive the winter. They are small mammals, and all of the bats of Illinois feed on insects. Thirteen species of bats are currently recognized as living in Illinois.
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