1 / 3

The Evolution of Vertebrates: Insights into Crocodilians and Birds

This lecture explores the fascinating evolution of vertebrates, focusing on two distinct groups: crocodilians and birds. Crocodilians are known for their powerful jaws, lengthy snouts, and sharp teeth, utilizing advanced hunting techniques. They exhibit complex behaviors, such as nest guarding and assisting hatchlings. Birds, or "feathered ones," possess lightweight feathers derived from scales, which aid in flight and insulation. This segment highlights their diverse sizes, colors, and courtship behaviors, as well as their reproduction through amniote eggs.

doyle
Download Presentation

The Evolution of Vertebrates: Insights into Crocodilians and Birds

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lecture 6ANIMAL EVOLUTION: THE VERTEBRATES

  2. 5. Crocodilians • Have powerful jaws, a lengthy snout & sharp teeth. • Large ones-yank on mammals & birds into water, rip them apart by violently spinning their body then gulp the chunks down. • Adjust their body temperature with behavioral and physiological mechanisms. • Have complex behavior; guard nests and assist hatchlings into water-similar to birds.

  3. The Feathered Ones • Birds • Feathers: • Lightweight structures derived from scales, used for flight and insulation. • ary greatly in size, proportions, coloration & capacity for flight. • Used in courtship displays • Have scales on their legs and some internal structures. • Lay amniote eggs.

More Related