Characteristics of Birds
________ is an upward force on a bird's wings.
Lift
Flightless birds can _________ or ____________ instead of flying.
run quickly or swim
The only mammals that lay eggs are _________.
Monotremes
Mammals are divided into groups based on how they ___________.
develop.
monotreme
A bird stores food in its __________.
Crop
These birds have webbed feet for swimming or long legs for wading.
Water Birds
______________ are structures that make milk.
mammary glands
The only mammal that can fly is _______
the bat.
________ an egg-laying mammal with large claws and a long snout.
echidna
Birds that fly have powerful flight muscles attached to ________.
a keel
__________ have special adaptations for resting on branches.
Perching Birds
Large brains help mammals survive by allowing them to
think and learn quickly
__________ a group of fish-eating ocean mammals, are also carnivores.
Pinnipeds.
__________ is an egg-laying mammal that lives in rivers and ponds.
Platypus
Why do birds spread oil on their feathers?
The oil makes the feathers water repellent.
These birds eat insects or other invertebrates in addition to mammals, fish, reptiles, and birds.
Birds of Prey
_________ is a large muscle that helps bring air into the lungs.
diaphragm
Define echolocation
The use of echoes to find things.
a kangaroo is a ________
Marsupial
What characteristic of birds allows them to produce lift?
wing shape
What happens to a perching bird that falls asleep while it is perching on a branch?
The perching birds feet will remain closed around the branch.
What are the 7 common characteristics of mammals?
1. Making milk
2. Breathing air
3. Endothermic
4. Have hair
5. Specialized teeth
6. Sexual reproduction
7. Have large brains
List two adaptations some primates have for living in trees.
1. grasping hands and feet
2. flexible shoulder joints
A Platypus is a _____.
Monotreme