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CLASS AVES

Delve into the diverse world of birds with over 10,400 species worldwide. Explore their unique characteristics such as feathers, wings, beaks, and more. Learn about bird classification, from Paleognathae to Neognathae, and discover fascinating facts about their anatomy and behavior.

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CLASS AVES

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  1. CLASS AVES BY MRS OZEMOKA H.J. CLASS AVES by MRS OZEMOKA H.J. is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License

  2. INTRODUCTION • Birds or Aves are the most noticeable, melodious and most beautiful of the vertebrates. • There are more than 10,400 species world wide. • They are found in the forests, deserts, mountains, praires and all oceans.

  3. CHARACTERISTICS • They are endothermic or warm blooded. • Their forelimbs are modified as wings. • They combine flight with bipedalismi.e two footed locomotion. • They have light bones which support flight and the body framework. • Feathers are a unique feature in birds. • They have scaly legs (lower part of the hind limb)

  4. INTRODUCTION CONTINUES • They have a horny beak, which is a modification of the jaws. • They have no teeth. • They have a four chambered heart. • Their lungs have air pouches for gaseous exchange. • They lack external ear lobe.They possess a large pectoral girdle with a wide sternum which is provided with keel for attachment of flight muscles (except in flightless birds like Ostrich). • Fertilization is internal. • The skull consist of a single occipital condyle (a smallbony knob).

  5. CLASSIFICATION • The class is divided into two super order namely: • Paleognathae • Neognathae.

  6. Super order Paleognathae • It means ancient jaw. It includes modern birds with ancestral archosaurian palate. Examples include: Ostriches, Cassowaries, kiwis etc.

  7. Super order: Neognathae • They are modern birds with flexible palate. The various orders include: Anseriformese.g Goose Galliformese.g Quail, Turkeys, domestic fowl etc. Sphenisciformese.g Penguins. They have short wings and are marine swimmers. Gaviiformese.g Loons which are swimmers and diverers. Phoenicopteriformese.gflamigos

  8. ASSIGNMENT 2 • Write on the different feathers found in birds. Describe them and state their functions. • Write an essay on migration in birds. • Write on the feet and beak modification as it relates to their feeding

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