1. Marine Birds

2. History  Probably evolved from dinosaurs about 160 million years ago.  Their reptilian heritage is clearly visible in their scaly legs and claws and the configuration of their internal organs and skeleton.  Probably evolved from dinosaurs about 160 million years ago.  Their reptilian heritage is clearly visible in their scaly legs and claws and the configuration of their internal organs and skeleton.

3. Characteristics  Endotherms  Feathers  Hollow Bones  Highly Efficient Respiratory System  Lay Eggs On Land  Incubate And Care For Young  Endotherms  Feathers  Hollow Bones  Highly Efficient Respiratory System  Lay Eggs On Land  Incubate And Care For Young

4. Adaptations For Marine Life  Like marine reptiles, seabirds have special salt-excreting glands in their heads to eliminate the excess salt taken in with their food.  Voracious feeders  True seabirds avoid land unless breeding  Like marine reptiles, seabirds have special salt-excreting glands in their heads to eliminate the excess salt taken in with their food.  Voracious feeders  True seabirds avoid land unless breeding

5. Four Main Groups  Tubenoses  Pelicans And Their Relatives  Gulls  Penguins  Tubenoses  Pelicans And Their Relatives  Gulls  Penguins

6. Tubenoses  Albatrosses  Most Oceanic  Large Efficient Wings  Plumbing In Beak Responsible For Sensing Air Speed, Detecting Smells, And Disposing Of Excess Salt  Albatrosses  Most Oceanic  Large Efficient Wings  Plumbing In Beak Responsible For Sensing Air Speed, Detecting Smells, And Disposing Of Excess Salt

7. Pelicans And Their Relatives  Pelicans, Cormorants, Frigate Birds, and Boobies  Throat Pouches  Webbed Feet  Pelicans, Cormorants, Frigate Birds, and Boobies  Throat Pouches  Webbed Feet

8. Gulls  Gulls and Terns  Efficient Flyers  Live Near The Shore  Buoyant Swimmers  Good Runners  Gulls and Terns  Efficient Flyers  Live Near The Shore  Buoyant Swimmers  Good Runners

9. Penguins  Lost ability to fly  Solid Bones  Greasy Peg-Like Feathers  Large Size And Weight  Neutral Buoyancy  Good Swimmers  Native to Southern Hemisphere  Lost ability to fly  Solid Bones  Greasy Peg-Like Feathers  Large Size And Weight  Neutral Buoyancy  Good Swimmers  Native to Southern Hemisphere