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A budgerigar with pin feathers showing
A budgerigar with pin feathers showing

There are thousands of common English language terms that are used in relation to the study of birds—warm-blooded vertebrates of the class Aves, characterized by feathers, the ability to fly in all but the approximately 60 extant species of flightless birds, toothless, beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart and a strong yet lightweight skeleton. Among other details such as size, proportions and shape, terms defining bird features developed and are used to describe features unique to the class—especially evolutionary adaptations that developed to aid flight. There are, for example, numerous terms describing the complex structural makeup of feathers (e.g., barbules, rachides and vanes); types of feathers (e.g., filoplume, pennaceous and plumulaceous feathers); and their growth and loss (e.g., colour mourph, nuptial plumage and pterylosis). Although some terms in the area may be familiar, such as back or belly, they too are defined in relation to distinct features of external bird anatomy, sometimes called topography. ( Full glossary...)

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Ramaria gracilis

Ramaria gracilis is a species of coral fungus in the family Gomphaceae. Originally described by Christiaan Hendrik Persoon in 1797, this species is found in European coniferous woodland, where it grows on leaf litter. Fruit bodies are made up of a dense cluster of branches that measure up to 8 centimetres (3.1 in) in height and 4 centimetres (1.6 in) in width.

Photograph: H. Krisp

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From Wikipedia, the free encyclopedia

From today's featured list

A budgerigar with pin feathers showing
A budgerigar with pin feathers showing

There are thousands of common English language terms that are used in relation to the study of birds—warm-blooded vertebrates of the class Aves, characterized by feathers, the ability to fly in all but the approximately 60 extant species of flightless birds, toothless, beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart and a strong yet lightweight skeleton. Among other details such as size, proportions and shape, terms defining bird features developed and are used to describe features unique to the class—especially evolutionary adaptations that developed to aid flight. There are, for example, numerous terms describing the complex structural makeup of feathers (e.g., barbules, rachides and vanes); types of feathers (e.g., filoplume, pennaceous and plumulaceous feathers); and their growth and loss (e.g., colour mourph, nuptial plumage and pterylosis). Although some terms in the area may be familiar, such as back or belly, they too are defined in relation to distinct features of external bird anatomy, sometimes called topography. ( Full glossary...)

Today's featured picture

Ramaria gracilis

Ramaria gracilis is a species of coral fungus in the family Gomphaceae. Originally described by Christiaan Hendrik Persoon in 1797, this species is found in European coniferous woodland, where it grows on leaf litter. Fruit bodies are made up of a dense cluster of branches that measure up to 8 centimetres (3.1 in) in height and 4 centimetres (1.6 in) in width.

Photograph: H. Krisp

Other areas of Wikipedia

  • Community portal – Bulletin board, projects, resources and activities covering a wide range of Wikipedia areas.
  • Help desk – Ask questions about using Wikipedia.
  • Local embassy – For Wikipedia-related communication in languages other than English.
  • Reference desk – Serving as virtual librarians, Wikipedia volunteers tackle your questions on a wide range of subjects.
  • Site news – Announcements, updates, articles and press releases on Wikipedia and the Wikimedia Foundation.
  • Village pump – For discussions about Wikipedia itself, including areas for technical issues and policies.

Wikipedia's sister projects

Wikipedia is hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other projects:


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