1keratin
What substance makes up a bird's bill?
2calcium carbonate
What is the outermost shell of an egg made of?
3gaping
What typed of bill has hinged jaws that allow the bill to be opened widely?
4bowerbird
What bird is known for building a huge "nest" and decorating it with shiny objects as part of its mating rituals?
5gliding
Which type of flight allows birds to coast "downhill"?
6perching
What type of foot has three forward toes and one hind toe?
7megapodes
Which group of birds does not provide any parental care for their young after hatching?
8peregrine falcon
What is the fastest bird?
9nuthatch
What type of bird is known for climbing down a tree trunk head first?
10yolk
What is the nutrient-rich fluid that feeds an unhatched chick?
11germinal spot
What is the region of an egg where the embryo develops?
12two forward, two backward
How are the toes of a climbing foot arranged?
13incubation
What is the act of keeping eggs warm for proper chick development called?
14field marks
What are the colors, patterns, and marking that are characteristic of a particular bird species?
15ostrich
What is the largest living bird?
16hovering
Hummingbirds are able to remain stationary in the air. What type of flight is this?
17alula
What retractable group of feathers is supported by a bird's "thumb" bone?
18two
How many shell membranes does a bird egg have?
19flyways
What are migration routes that birds follow year after year called?
20keratin
Of what substance are the shell membranes of a bird egg made?
21preen gland
What organ produces oil that birds spread over their feathers?
22keel
What structure on a bird's sternum provides an attachment for the flight muscles?
23mobbing
A flock of smaller birds is harassing a larger bird. What is this behavior called?
24gizzard
What special section of a bird' stomach grinds food to make it more easily absorbed?
25flightless birds
most members do not have a keel
26game birds
includes many edible birds that are or have been hunted
27water birds
includes pelicans and grebes
28birds of prey
includes eagles and hawks
29game birds
includes chickens and quail
30flightless birds
includes ostriches and emus
31tropical birds
includes macaws and parakeets
32contour
The strong feathers found on a bird's body, wings, and tail are ? feathers.
33monocular
Most birds are able to detect danger from all sides because they are designed with ? vision.
34instinct
Birds are able to know what kind of nest to build because of built-in knowledge called ? .
35altitudinal
Some birds migrate by moving short distances up or down a mountain. This is ? migration.
36dusting
A bird "bathing" himself in the dirt is called ? .
37feathers
You are researching birds and find and article titled "True Colors: Decoding Bird Plumage." Plumage is referring to the birds' ? .
38crop
The food-storage sac in a bird's esophagus is the ? .
39pectorals
A bird's most important flight muscles are the ? .
4040. shaft
41. barbule
42. barb
43. vane
41syrinx
true/false The organ that allows birds to produce sound without vocal cords is the larynx.
42Andean condor
true/false The largest flying bird is the bald eagle.
43true
true/false Birds such as sandpipers and whimbrels have long, slender probing bills for retrieving crustaceans burrowed in the sand.
44molt
true/false Birds preen to replace their old, broken feathers with new ones.
45true
true/false A bird that is born with down feathers and is able to run shortly after birth is said to be precocial.
46four
true/false Birds have a two-chambered heart.
47true
true/false The yolk body is held in place by two dense, twisted cords called chalazae.
48down
true/false The soft, fluffy feathers found nearest a bird's body are contour feathers.
49true
true/false The smallest of all birds is the bee hummingbird.
50songbirds
Which of the following is most likely to be the preferred food of a bird with binocular vision?
51The parent must transfer body heat to the eggs.
Which of the following statements best explains why birds lose the feathers on their brood patch?
52grasping feet
What type of feet do hunting birds like hawks need to capture their prey?
53swimming feet
As you are walking through the park, a bird crosses your path. You notice that its feet have four toes each. Three point forward and are connected by webbing, and the fourth points straight back. What type of feet does this bird have?
54soaring
A sailplane is a type of airplane that does not have an engine. Sailplanes can be flown cross-country by circling inside a thermal to gain altitude and then gliding to another thermal. Which type of bird flight does this technique resemble?
55altricial
The chicks of the American robin hatch without feathers and have their eyes closed for the first several days. What type of chick does the American robin have?
56-Birds are designed with air sacs that store air during the cycle of breathing and air tubes that extend into the bones; mammals do not have sacs and tubes. These air sacks and tubes allow bird's unique breathing patterns and help cool the body by absorbing heat.
-Instead of using a diaphragm to bring air into the lungs, birds use their chest muscles to expand and contract the thoracic cavity. This causes the bird to breathe more vigorously during flight.
-A bird's lungs have air capillaries that allow air to flow straight through, unlike mammalian lungs, which have dead-end alveoli. Air travels through the lungs rather than in and out of them. This gives the avian lung a steadier oxygen supply and allows higher oxygen-transfer rates.
-Mammals inhale and exhale once for each breath; however, birds inhale and exhale twice to move each breath through the respiratory system. This allows the bird to extract the maximum amount of oxygen from each breath.
Describe four main differences between the avian and mammalian respiratory systems and explain how each shows birds' design for their lifestyle.