Science
What substance makes up a birds bill?
keratin
A bird "bathing" himself in the dirt is called this
dusting
The organ that allows birds to produce sound without vocal cords is the __________
syrinx
What organ produces oil that birds spread over their feathers?
preen glands
What type of bird is knwon for climbing down a tree trunk head first?
nuthatch
What is the nutrient-rich fluid that feeds an unhatched chick?
yolk
The food-storage sac in a birds esophagus is the _______________.
crop
The smallest of all birds is the __________________
bee hummingbird
What special spection fo a bird's stomach grinds food to make it more easily absorbed?
gizzard
Most members of this bird family do not have a keel
flightless birds
What type of flights allows birds to coast "downhill"?
gliding
What is the largest living bird?
ostrich
The yolk body is held in place by two dense, twisted cords called ____________
chalaze
Most birds are able to detect danger from all sides becuase they are designed with _________ vision
monocular
What is the outermost shell of an egg made of?
calcium carbonate
The strong feathers found on a bird's body, wings, and tail are ___________ feathers.
contour
This group of birds includes chickens and quail
game birds
The chicks of the American robin hatch without feathers and have their eyes closed for the first several days. What type of chicks does the American robin have?
altricial
megapodes
What type of foot has three forward toes and one hind toe?
perching
You are researching birds and find an artciles titled "True Colors: Decoding Bird Plumage." Plumage is referring to the birds' ___________
feathers
The group of birds includes macaws and parakeets
tropical birds
Hummingbirds are able to remain stationary in the air. What type of flight is this?
hovering
What bird is known for building a huge "nest" and decorating it with shiny objects as part of its mating rituals
bowerbird
What type of bill has hinged jaws that allow the bill to be opened widely?
gaping