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feathers
(Encyclopedia) CE5 Structure of a bird feather feathers, outgrowths of the skin, constituting the plumage of birds. Feathers grow only along certain definite tracts (pterylae), which vary in different groups of ...plumage
(Encyclopedia)plumage, of birds: see feathers. ...wings
(Encyclopedia) CE5 A. Structure of a bird wing B. Structure of a bat wing wings, flight organs of the bird, the bat, and the insect. Birds' wings are pectoral appendages that are basically the same in skeletal...Archaeopteryx
(Encyclopedia)Archaeopteryx ärˌkēŏpˈtərĭks [key] [Gr.,=primitive wing], a 150 million-year-old fossil animal first discovered in 1860 in the late Jurassic limestone of Solnhofen, Bavaria, and described the f...guano
(Encyclopedia)guano gwäˈnō [key], dried excrement of sea birds and bats found principally on the coastal islands of Peru, Africa, Chile, and the West Indies. It contains about 6% phosphorus, 9% nitrogen, 2% pota...frogmouth
(Encyclopedia)frogmouth, common name for small, owllike birds of the family Podargidae, ranging in size from 9 to 21 in. (22.5–52.5 cm). Their soft plumage is a mottled gray-brown in color with little distinction...molting
(Encyclopedia)molting, periodical shedding and renewal of the outer skin, exoskeleton, fur, or feathers of an animal. In most animals the process is triggered by secretions of the thyroid and pituitary glands. Near...iridescence
(Encyclopedia)iridescence ĭrˌədĕsˈəns [key], exhibition of rainbowlike colors on a surface. It usually results from interference when light composed of different wavelengths is reflected from the superficial ...sea whip
(Encyclopedia)sea whip, erect colony of marine animals of the phylum Cnidaria, with whiplike branches. The skeleton consists of a horny axis, overlaid with small calcareous bodies called spicules. Often beautifully...scleroprotein
(Encyclopedia)scleroprotein, large class of protein molecules that are ordinarily insoluble in water. The scleroproteins are employed principally for architectural purposes in the living cell and are localized in t...Browse by Subject
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