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aves    
n. 鸟类

鸟类

Aves
n 1: (ornithology) the class of birds [synonym: {Aves}, {class
Aves}]

Aves \A"ves\, n. pl. [L., pl. of avis bird.] (Zool.)
The class of Vertebrata that includes the birds.
[1913 Webster]

Note: Aves, or birds, have a complete double circulation,
oviparous reproduction, front limbs peculiarly modified
as wings; and they bear feathers. All existing birds
have a horny beak, without teeth; but some Mesozoic
fossil birds (Odontornithes) had conical teeth inserted
in both jaws. The principal groups are: {Carinat[ae]},
including all existing flying birds; {Ratit[ae]},
including the ostrich and allies, the apteryx, and the
extinct moas; {Odontornithes}, or fossil birds with
teeth.
[1913 Webster]

Note: The ordinary birds are classified largely by the
structure of the beak and feet, which are in direct
relation to their habits. See {Beak}, {Bird},
{Odontonithes}.
[1913 Webster]


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  • Bird - Wikipedia
    Birds are a group of warm-blooded vertebrate animals constituting the class Aves, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton
  • Bird - Aves, Species, Orders | Britannica
    Bird - Aves, Species, Orders: In classifying birds, most systematists have historically relied upon structural characteristics to infer evolutionary relationships
  • Birds or Class Aves - Description and Characteristics
    Learn about birds or class Aves Discover what a bird is, its characteristics, and its relationship to mammals and dinosaurs
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  • Bird | Description, Species, Feathers, Facts | Britannica
    bird, (class Aves), any of the approximately 11,200 living species unique in having feathers, the major characteristic that distinguishes them from all other animals
  • Birds of the World - Cornell Lab of Ornithology
    Comprehensive life histories for all bird species and families Unlock species accounts, maps, multimedia, and bird family overviews For public and academic libraries, government agencies, consulting firms, nature centers, nonprofits, and more
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  • Aves - Definition and Examples - Biology Online Dictionary
    Aves is a class of warm-blooded vertebrates that includes birds They have wings modified from their forelimbs and developed flying muscles
  • Portal:Birds - Wikipedia
    Birds are a group of warm-blooded vertebrate animals constituting the class Aves, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton
  • Cornell Lab Bird Cams | Cornell Lab Bird Cams - All About Birds
    We work to make watching an active experience, sparking awareness and inspiration that can lead to conservation, education, and engagement with birds Our viewers tell us that watching the cams is a life changing experience: an unprecedented learning experience that they liken to virtual field trips or field biology in their living room





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