1. Class Aves (or is it Class Reptilia??)
Birds
Class Aves
(or is it Class Reptilia??)

2. Bird Ancestry Origin of bird’s controversial
Dinosaur-bird link?
Dinosaurs and birds from common reptilian ancestor?
Birds share many similarities with reptiles:
Scales, hinged jaw, rib processes, ankle joint, egg tooth, shelled egg, etc.

3. Bird Ancestry
Archaeopteryx lithographica

4. Ancestral
Birds
Modern
Birds

5. Avian Characteristics
Feathers
Endothermic
Claws on feet
Hollow bones
Oviparous
Sexual dimorphism

6. Marine Birds Webbed feet Waterproof feathers
Spend lives at sea and feed on marine organisms
Nest on land

7. Class Aves Order Gaviformes Order Procellariiformes
Loons
Order Procellariiformes
‘Tubenoses’
Order Pelicaniformes
Pelicans, Gannets, etc
Order Ciconiiformes
Herons & Egrets
Order Anseriformes
Ducks, geese, & swans
Order Falconiformes
Osprey
Order Charadriiformes
Gulls, Terns, etc