Dictionary » A » Aves

Aves

Aves

(Science: ornithology, zoology) The class of vertebrata that includes the birds.

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: Carinatae, including all existing flying birds; ratitae, including the ostrich and allies, the apteryx, and the extinct moas; odontornithes, or fossil birds with teeth.

The ordinary birds are classified largely by the structure of the beak and feet, which are in direct relating to their habits. See beak, bird, Odontonithes.

Origin: L, pl. Of avis bird.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Re: Pentadactyl limb....

Pentadactyl limbs is a common feature found in tetrapods. The class amphibian, reptile, aves (birds), and mammals fall under this superclass tetrapods. The order primates fall under the class mammalia (mammals). So primates are mammals and they are Pentadactyl.

See entire post
by Jean1Mack
Fri Mar 21, 2014 6:55 pm
 
Forum: Zoology Discussion
Topic: Pentadactyl limb....
Replies: 8
Views: 5084

Book recommendation for exam

... : Origin of tetrapods; parental care, paedomorphosis. 15. Reptilia : Origin of reptiles; skull types; status of Sphenodon and crocidiles. 16. Aves : Origin of birds; flight adaptation, migration. 17. Mammalia : Origin of mammals; denitition; general features of egg-laying mammals, pouched-mammals, ...

See entire post
by bertstare
Sun Oct 21, 2012 2:19 pm
 
Forum: Zoology Discussion
Topic: Book recommendation for exam
Replies: 3
Views: 6117

Crop & gizzard

... Any enzyme secretion? 3. Churning should take place in crop, gizzard or both? 4. What animal groups have these? (I think annelids, arthropods and aves. Any others?) 5. How are these structures specialized among various groups? (eg. the avian gizzard is specialized for grinding seeds and nuts. ...

See entire post
by Adz795
Tue Jan 03, 2012 8:31 am
 
Forum: Zoology Discussion
Topic: Crop & gizzard
Replies: 2
Views: 6094

Re: Cladistic relatedness of Aves and Reptiles

Steve, thanks very much for the information and quick replies. Unfortunately, there was no bet over the matter. My girlfriend and I would very much enjoy a night on the town at my brother's expense! :lol:

See entire post
by Weston
Tue Oct 19, 2010 8:13 pm
 
Forum: Evolution
Topic: Cladistic relatedness of Aves and Reptiles
Replies: 6
Views: 6409

Re: Cladistic relatedness of Aves and Reptiles

According to L.M. Chiappe and G.J. Dyke (2002), "most researchers agree that birds are theropod dinosaurs." Even before this consensus formed, the other candidates for birds' ancestors were all reptiles, specifically turtles, lizards, crocodylomorphs, pterosaurs, and other kinds of dinosau...

See entire post
by StevePush
Tue Oct 19, 2010 5:22 pm
 
Forum: Evolution
Topic: Cladistic relatedness of Aves and Reptiles
Replies: 6
Views: 6409
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 11,092 times. 
What links here | Related changes | Permanent link