1. Birds Birds have two types of feathers. Contour feather Down feather
Contour feathers help birds fly.
Down feathers help keep the birds warm.

2. Birds structure Birds don't have bones in their tails.
The more bones attached to a bird the stronger the bird.
Some flightless birds have stronger bones in their legs for running. Like the Ostrich.

3. Birds Characteristics
Some live in tropical areas and others can live in polar regions
Different birds have different beaks that are used in different ways.
Birds have curved wings
Some birds have some characteristics like reptiles.
A Sparrow's heart is % of its weight a humans heart is .42% of its weight

4. Birds Characteristics
Some live in tropical areas and others can live in polar regions
Birds lay amniotic eggs.
A group of eggs are called a clutch
Different birds have different beaks that are used in different ways.
A Sparrow's heart is 1.68 % of its weight a humans heart is .42% of its weight
Some birds have some characteristics like reptiles.
Feathers help maintain the birds temperature

5. Birds Characteristics
Some live in tropical areas and others can live in polar regions
Birds lay amniotic eggs.
A group of eggs are called a clutch
Different birds have different beaks that are used in different ways.
A Sparrow's heart is % of its weight a humans heart is .42% of its weight
Some birds have some characteristics like reptiles.
Feathers help maintain the birds temperature

6. How birds help Owls help control pests such as rats and mice
They help humans learn how to make a plane fly
They help feed some humans and animals
Other like hummingbirds help pollinate flowers

7. Bird species
There are over nine thousand species of birds

8. Bird eggs
A group of eggs are called a clutch
Birds lay amniotic eggs

9. Birds circulation system
A birds blood circulates fast so it can get to the birds muscles fast

10. ANGRY BIRDS