Ch. 4 Sec. 1 BirdsCh. 4 Sec. 1 Birds

Why did the gum cross the road?

It was stuck to the chicken’s foot.

By looking at these pictures, what By looking at these pictures, what are some characteristics that birds are some characteristics that birds have in common?have in common? WORDLE

Characteristics of birds• endothermic

• vertebrates

• feathers

• 4-chambered heart

• lay eggs- internal fertilization

• scales on feet & legs

• MOST can fly b/c of hollow

bones & large chest muscles

YouTube video-Bill Nye Birds Song

Characteristics of Birds video clip

typesof

feathers

contour flight down

1. contour feather• give shape to bird’s body

2. flight feather

• contour feather that extends beyond bird’s body on wings & tail

• help bird balance & steer

3. down feather

• trap heat & keep bird warm

• trap air good insulator

A pine grosbeak puffs out its chest to trap air in the layer of down feathers next to its skin.

A Down-Filled Jacket Wearing a jacket stuffed with down feathers helps this boy stay warm.

How Birds Obtain OxygenHow Birds Obtain Oxygen

respiratory systemrespiratory system• air sacs connect to lungs• allows birds to extract more oxygen from air

circulatory system• 4 chambered heart- 2 atria & 2 ventricles

• 2 loops - oxygen rich blood doesn’t mix with oxygen poor blood

How Birds Obtain FoodHow Birds Obtain Food

cropcrop• stores food after swallowing it• "doggy bag"

gizzard

• 2nd part of stomach

• squeezes & grinds partially digested food

• swallow small stones to help crush food

Two vultures were in the desert eating a dead clown. The first vulture asks the second vulture: "Does this taste funny to you?"

Egg - day 1 Egg - day 4

Reproduction & caring for youngReproduction & caring for young

internal fertilization

lay hard shell eggs

eggs develop @ temp. close to body temp. of parent

A parent bird incubates the eggs by sitting on them to keep them warm.

Hummingbirds lay the smallest eggs of any birds–their egg is no bigger than a jelly bean!

Why do hummingbirds

hum?

Because they don't know the words.

Largest eggLargest egg An ostrich egg is bigger than a

grapefruit and weighs as much as two dozen chicken eggs!

Fact: It takes about 40 minutes to hard-boil an ostrich egg.

The ostrich egg is the largest egg hatched by any bird on earth. So just imagine how gross it would be to eat an entire ostrich egg raw!

Fear Factor contestant drinking an entire raw ostrich egg. Yuk!

What do you get when you cross a Golden Eagle with a razor?

A Bald Eagle! A Bald Eagle!

+

bird adaptations

• Shape of feet Shape of feet & legs& legs

ostrich

Northern Three-toed Woodpecker

duck

bird feet

Perching birds have

feet adapted to

grasp branches.

• beak beak adaptationsadaptations

Belted Kingfisher

Peregrine Falcon Brown Creeper

Blue-winged Warbler

Ruby-throated Hummingbird

Hudsonian Godwit

A duck walks into a drug store and buys a Chapstick. The clerk says, "Will that be cash or charge?"

The duck says, "Just put it on my bill!"

Bird Beaks

• come in all sorts of shapes, sizes, & colors

• different shapes determine what types of food that bird can eat

bird beaks

Why birds are important

1. nectar-eating birds carry pollen

2. seed-eating birds carry seeds to new places

3. chief predators of pest animals (rats & mice)

Keeping the Streets Clean

Cardinal Pope

Dancing is For the Birds

Toronto’s Mascot

Swan Lake

Teen Parrot

Eagle Woods

Toronto Blue Jays Vs. Baltimore Orioles...Blue Jays up to bat!

Night Watchman

Your pilot today…

Bathroom Break

Barn Owl

OWL PELLETS-products of a

special gizzard • Several hours after an owl eats,

the fur, bones, teeth & feathers of its prey, still in the gizzard, are compressed into a pellet the same shape as the gizzard.

• Once formed, the pellet moves up from the gizzard and is regurgitated.

OWL PELLETS-products of a

special gizzard

• Owls can't eat while a fully formed pellet is present, blocking the digestive tract.

• When an owl is ready to produce a pellet it usually closes its eyes, gets a funny look in its face, doesn't want to fly, and when the pellet is ready to come out, the beak is opened and the pellet simply drops out.

OWL PELLET OBSERVATIONOWL PELLET OBSERVATION • 1. MEASURE THE OWL PELLET (IN MILLIMETERS)

a. LENGTH OF THE PELLET ___________mm b. DIAMETER OF THE PELLET _________mm

• 2. IDENTIFY AT LEAST THREE PHYSICAL CHARACTERISTICS OF THE PELLETS - SMELL, COLOR, TEXTURE, ETC.

1. 2. 3.

• 3. WHAT DO YOU THINK IS INSIDE OF THE PELLET?

• 4. IN WHICH PART OF THE OWL DOES THE PELLET FORM?

• 5. WHY DOES THIS PELLET FORM?

• 6. AFTER OPENING THE OWL PELLET, WHAT TYPES OF BONES & TEETH WERE ATTAINED?

owl pellet owl pellet dissectiondissection

Egg activityEgg activity

• Activity: Air Holes in Eggs

Eggs are covered with tiny holes, too small to see with the naked eye, that allow oxygen to pass into the growing baby and carbon dioxide to pass out.

To see these breathing holes in action, make a small hole in one end of a chicken egg.

Use a needle to break up the yolk, and shake all the yolk and white out of the egg.

Seal the hole completely with tape. Now, place the egg in a bowl of water and hold it under. You will be able to see air bubbles rise right out of the

egg’s shell as the air trapped inside seeps out through the tiny holes!