Birds part B

Question 1

During flight metabolic rate increase by how much?

Answer 1

10xBMR

Question 2

Birds have how many chambers in the heart?

Answer 2

4 chambered heart, good for circulation, high blood pressure as well

Question 3

Crop?

Answer 3

Storage chamber - food passed on for digestion or regurgitated for young

Question 4

Proventriculus

Answer 4

Enzyme production: site of pellet formation in owls

Question 5

Gizzard

Answer 5

Muscular chamber line with rough keratin (contains sandy grit (ingested by birds)

Question 6

Excreted uric acid goes into

Answer 6

the cloaca

Question 7

Excess water is reabsorbed by

Answer 7

The cloaca

Question 8

Endothermic

Answer 8

Use metabolic hear to maintain a warm constant body temp

Question 9

ectothermic

Answer 9

Use environmental temperature to regulate body temp

Question 10

5 ways for thermoregulation warming

Answer 10

Shivering, Feathers, posture, Thermal counter current, Communal roosts (social behavior)

Question 11

thermoregulation for cool 3 ways

Answer 11

evaporation, Panting Gular Flutter
Poster (spreading of the wings)
radiation

Question 12

2 ways for bird senses

Answer 12

Vision is a dominant sense

Hearing (owls have two asymmetrical ears)

Question 13

defining characteristics for migration

Answer 13

Seasonal and large numbers of individuals

Question 14

Movement away from a natal area for migration

Answer 14

Dispersal. solitary and new location unpredictable

Question 15

Movement away from a good poor area

Answer 15

Irruptions. Not annual and unpredictable

Question 16

Birds migrate when

Answer 16

Benefits are higher than costs

Question 17

Modes of migration (5 in total)

Answer 17

Flight pattern
Time of day
Flight mode 
length of migration 
Completeness

Question 18

Flight pattern?

Answer 18

Non stops and hops

Question 19

Time of day migration

Answer 19

Diurnal migrants -using thermal wings and updrafts

Nocturnal migrants - 1/2 hour before sunset because its cooler and air less turbulent

Question 20

Flight modes

Answer 20

Soarers - flight concentrated in mid - day when thermals occur
powered flight - often crepuscular (star before dawn)

Question 21

Orientation in migration is achieved by

Answer 21

Sun compass, star compass and magnetic compass

Question 22

Navigation in migration is achieved by

Answer 22

Coast lines, mountain ranges, large rivers

Question 23

Natal dispersal

Answer 23

The first movement away from the nest area (high mortality)

Question 24

Breeding dispersal

Answer 24

Movement of adults between different breeding locations