1. Class Aves: Birds

2. Characteristics
• Feathers
• Wings
• Beak/Bill
• Oviparous
• Lightweight skeleton
• Molting
Penelopedis panini

3. Feathers
• Made of keratin
• Plumage- covering of feathers on a bird

4. Function
• Form flight surfaces that provide lift and aid
steering
• Prevent excessive heat loss
• Incubation
• Courtship
• Water proofing

5. Types of Feathers
•Pennaceous Feathers
•Plumulaceous Feathers

8. Pennaceous Feathers
• Flattened, tightly closed feathers that
create aerodynamics surfaces such as
those of wings and tails

9. Plumulaceous Feathers
• Rudimentary shaft to which a wispy tuft
of barbs and barbules is attached.

10. Skeleton

11. Muscle
• Strongest muscle of most birds are the flight muscles, it has a lot
of mitochondria.

12. Flight

13. Digestion

14. Sight

15. Reproduction
• Monogamous
• Polygamous

16. Nesting Activities
• Clutch-group of eggs and chicks produced by
a female.
• Altricial-birds that are entirely dependent
on their parents upon hatching.
• Precocial-alert and lively at hatching.