Featured Article: How Cave Biology Works
A funny thing happens when you live in complete darkness. You lose your eyesight. At least that's what's happened to the species that have evolved inside our deepest, darkest caves. See more »
animal facts library
Learn about some of the strange and unusual facts and terms in the animal kingdom.
Butterfat or Milkfat
Butterfat, or Milkfat, the natural fat of milk. It is the chief component of butter.
See more »Chicago Zoological Park
Chicago Zoological Park, or Brookfield Zoo, a zoo in Brookfield, Illinois. It covers 215 acres (87 hectares) 14 miles (23 km) west of downtown Chicago.
See more »Chordates
Chordates, members of the animal phylum Chordata, which includes all mammals, birds, amphibians, reptiles, and fish.
See more »Fish Culture
Fish Culture, the breeding, rearing, and distributing of fish. Fish culture, also called aquaculture, fish farming, and pisciculture, is important in maintaining the supply of food and game fishes, and in extending the area in which they may be caught.
See more »Fodder
Fodder, food for livestock, specifically the dried stalks and leaves of corn and sorghums.
See more »Forage
Forage, animal feed that consists primarily of leaves and stalks of plants. Such plants as grasses and legumes are most commonly used.
See more »Germicide
Germicide, a substance or agent that kills microorganisms. A disinfectant is a type of germicide that kills germs that cause disease.
See more »Hermaphrodite
Hermaphrodite, an organism that has both male and female reproductive organs. For some species, hermaphroditism is normal.
See more »Hibernation
Hibernation, the long winter sleep of certain animals. In hibernation there is a considerable lowering of body temperature, along with a slowed rate of breathing and heartbeat.
See more »Hog Cholera
Hog Cholera, a highly contagious disease of swine that formerly killed large numbers of hogs.
See more »Incubation
Incubation, the act of providing proper physical conditions for the development of certain living organisms.
See more »Ivory
Ivory, a hard, fine-grained, creamy-white substance resembling bone. The teeth of most animals consist largely of ivory.
See more »Larva
Larva, a young animal that must undergo metamorphosis (a marked change in form) before it becomes an adult.
See more »Mammals
Mammals, the group of vertebrates (animals with backbones) to which human beings belong.
See more »Metamorphosis
Metamorphosis, in zoology, marked changes in form during the growth of an animal.
See more »Metazoa
Metazoa, in biology, a term for all animals whose bodies are composed of more than one cell.
See more »Molting
Molting, or Moulting, the shedding, or casting off, of feathers, hair, horns, shell, or a layer of skin by an animal.
See more »Musk
Musk, a substance with a strong, penetrating odor. It is obtained from a large abdominal gland of the male musk deer.
See more »National Ocean Service
National Ocean Service (NOS), a unit in the National Oceanic and Atmospheric Administration (NOAA) of the Department of Commerce.
See more »Notochord
Notochord, a flexible supporting rod along the back of an animal. It is present in all chordate animals at some stage in their development.
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