Organ used to store food
What is the crop?
The practice of birds caring for their eggs
Incubation
Are birds endothermic or ectothermic?
Endothermic
Group of mammals has a placenta to nourish the developing embryo
Placental mammals
Camels and pigs are part of this order
Hoofed mammals
Provides fresh air to the lungs when the bird is both inhaling and exhaling
What are the air sacs?
The process a bird uses to clean, align, and waterproof its feathers with oil
Preening
Characteristics of mammals
Have hair and mammary glands, which produce milk
Carries their young in a pouch
Marsupials
This order has large canine teeth for tearing
Carnivora
Feathers that give the bird a streamlined shape and help insulate it from water. Includes the large wing and tail feathers
Contour feathers
Five main parts of a fertile bird egg
Embryo, yolk, albumen, shell membrane, shell
Koalas, kangaroos, and opossums are examples of what mammal group?
Marsupials
Duck-billed platypus and echidna
Monotremes (egg-laying mammals)
Order characterized by opposable thumbs, forward-facing eyes, and ability to walk on two legs
Primates
Feathers that hold warm air close to the body
Down feathers
How is a developing chick able to get oxygen?
Tiny pores in the shell and membrane allow oxygen and carbon dioxide to be exchanged
The process of a bird replacing its feathers
Molting
Dogs, horses, and whales are all part of this group
Placental mammals
Characteristic of the largest order of mammals
Rodentia are the gnawing mammals
How are a bird's bones designed to be lightweight and strong?
They have air spaces and crisscross structures.
Two reasons birds require a continuous supply of energy
1, Endothermic
2. Flight muscles require large amounts of energy
How is the molting of a bird different from the molting of a snake?
The snake molts all at once and the new skin is completely developed. A bird loses its feathers gradually over weeks or months.
Groups are named based on
how they reproduce
The only flying mammal
Bats
Order Chiroptera