Section 17.3-- Family Life of Birds

Question 1

annually moving to different regions that is characteristic of many kinds of birds

Answer 1

migration

Question 2

it is common for birds to gather in large groups called

Answer 2

flocks

Question 3

migration champion of the world

Answer 3

arctic tern

Question 4

some things known about migration:

Answer 4

1. migrating bords follow the same rout every year (flyway)
2. a keen sense of direction and a recognition of landmarks is involved
3. the position of the sun and stars guides many birds
4. the earth’s magnetic fields helps guide some birds
5. timing appears to be influenced by birds’ pituitary gland and by environmental factors such as weather and length of daylight
6. generally occurs in the spring and fall
7. most migration is north and south

Question 5

finding a mate is usually associated with

Answer 5

territoriality
recognition of the proper species

Question 6

courtship is ordinarily dominated by the

Answer 6

male

Question 7

the egg expands in route to the cloaca as ___________ is added to it, having been manufactured and secreted by special glands

Answer 7

albumen (egg white)

Question 8

the center part of the egg

Answer 8

yolk

Question 9

accounts for the entire center part (yolk)

Answer 9

egg cell

Question 10

the bulk of the yolk body is a fat rich food source for the tiny embryo, which develops at a special location called the

Answer 10

germinal spot

Question 11

a very dense twisted cord that runs through the middle of the albumen layers

is attached to the yolk and acts as a support for the yolk

Answer 11

chalaza

Question 12

an unlearned knowledge that an animals possesses from birth

Answer 12

instinct

Question 13

all the activity of picking a nesting spot, making the nest, making sure it’s padded correctly is for a specific purpose:

Answer 13

protecting the eggs

Question 14

the purpose of birds’ varied nests is one:

Answer 14

providing for a place for the birds to incubate the eggs

Question 15

involves keeping the eggs warm, usually by an adult sitting on them

Answer 15

incubation

Question 16

in response to the presence of eggs, the adult loses feathers on its belly to expose a patch of skin called the

Answer 16

brood patch

Question 17

most American songbird hatchlings are ____________
means that they are naked and helpless at hatching

Answer 17

altricial

Question 18

chicks of most water birds are____________
means that they are covered with down and able to run or swim almost immediately after hatching

Answer 18

precocial

Question 19

all doves and pigeons produce _________________ rich in protein and fat

produced by special cells lining the crop instead of by external glands

Answer 19

crop milk

Question 20

two major effects of territorial behavior is

Answer 20

isolation
dispersion