31-2 Birds

Front 1

Birds are reptile-like animals that..

Back 1

maintain a constant internal body temperature

have an outer covering of feathers

two legs covered in scales used for walking or perching

front limbs modified into wings

Front 2

What is the single most important characteristic that separates birds from all other living animals?

Back 2

feathers

Front 3

endotherms

Back 3

have a high rate of metabolism; can generate own body heat

Front 4

metabolism produces?

Back 4

heat

Front 5

any body heat that a bird loses must be regained by _____ ____.

Back 5

eating food

Front 6

why is the phrase "eats like a bird" misleading?

Back 6

most birds are voracious eaters

Front 7

besides storing and moistening food, what else does the crop do?

Back 7

the breakdown of cells in the crop produces a substance that is rich in protein and fat

Front 8

what is found in the gizzard?

Back 8

small piece of stone and gravel

Front 9

whats the function of stone in the gizzard?

Back 9

grind the food

Front 10

besides the lungs, what other structures help in respiration ?

Back 10

air sacs

Front 11

what advantage does the efficient, one-way respiratory system of birds provide?

Back 11

helps birds maintain their metabolic rate

Front 12

birds have ___ - chambered hearts and ____ separate circulatory loops

Back 12

four; two

Front 13

there is a ___ ___ of oxygen-rich and oxygen-poor blood

Back 13

complete separation

Front 14

what is in a bird dropping and why is it white and pasty?

Back 14

uric acid crystals

Front 15

a bird's brain is relatively ____ for its body size

Back 15

large

Front 16

why is it important that the frame of the bird is so sturdy?

Back 16

it anchors the muscles used for flight

Front 17

the bones are strengthened by ____ ____.

Back 17

internal struts

Front 18

what makes bones lightweight?

Back 18

air spaces

Front 19

in birds, both male and female reproductive traits open in to the ____

Back 19

cloaca

Front 20

bird eggs are .... ?

Back 20

amniotic eggs

Front 21

how does a chick get out of its egg?

Back 21

it uses it's small tooth on it's bill

Front 22

there are about ____ different orders and the largest order is the _____ or ____ birds.

Back 22

passerines ; perching

Front 23

examples of passerines or perching birds:

Back 23

larks, sparrows, finches

Front 24

list 3 ways birds contribute to the environment:

Back 24

1. pollinate flowers

2. disperse seeds

3. help control insect population