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Rotifera

(Encyclopedia)Rotifera, phylum of predominantly free-living, microscopic, aquatic or semiterrestrial pseudocoelomates. Each rotifer has a head bearing a crown of cilia, the corona, at the anterior end; most rotifer...

hare

(Encyclopedia)hare, name for certain herbivorous mammals of the family Leporidae, which also includes the rabbit and pika. The name is applied especially to species of the genus Lepus, sometimes called the true har...

grasshopper

(Encyclopedia)grasshopper, name applied to almost 9,000 different species of singing, jumping insects in two families of the order Orthoptera. Grasshoppers are long, slender, winged insects with powerful hind legs ...

ground squirrel

(Encyclopedia)ground squirrel, name applied to certain terrestrial rodents of the squirrel family. In North America the name refers to members of the genus Citellus and sometimes to the closely related genera Tamia...

fly, in zoology

(Encyclopedia)fly, name commonly used for any of a variety of winged insects, but properly restricted to members of the order Diptera, the true flies, which includes the housefly, gnat, midge, mosquito, and tsetse ...

opossum

(Encyclopedia)opossum əpŏsˈəm, pŏsˈ– [key], name for several marsupials, or pouched mammals, of the family Didelphidae, native to Central and South America, with one species extending N to the United States...

maple

(Encyclopedia)maple, common name for the genus Acer of the Aceraceae, a family of deciduous trees and shrubs of the Northern Hemisphere, found mainly in temperate regions and on tropical mountain slopes. Acer, the ...

mackerel

(Encyclopedia)mackerel, common name for members of the family Scombridae, open-sea fishes including the albacore, bonito, and tuna. They are characterized by deeply forked tails that narrow greatly where they join ...

lemming

(Encyclopedia)lemming, name for several species of mouselike rodents related to the voles. All live in arctic or northern regions, inhabiting tundra or open meadows. They frequently nest in underground burrows, par...

sunbird

(Encyclopedia)sunbird, common name for tropical, Old World birds, including more than one hundred species in the family Nectariniidae. Like the unrelated New World hummingbirds, to which sunbirds are often compared...