What shape helps birds fly easily?
streamlined
square
round
flat
What food does this beak eat?
nectar
insects
seeds
fish
A high metabolic rate means birds can _____.
produce energy quickly
eat less food
grow slowly
sleep a lot
Birds have streamlined bodies to reduce _____.
body weight
gravity
air resistance
body heat
Feathers help birds to _____.
hear sounds
breathe
steer and lift
smell food
A seagull’s skeleton is about _____ of its body weight.
10%
5%
15%
20%
Look at the bird. What type of beak is this?
spear
short thick
flat
long narrow
Which bone is in both bird wings and human arms?
jaw
rib
skull
humerus
Pelicans use their beaks to _____.
drink nectar
crack nuts
scoop water and fish
dig holes
Which feature of Archaeopteryx is similar to dinosaurs?
teeth
wings
feathers
hollow bones
Birds evolved from _____.
fish
dinosaurs
insects
mammals
Birds that eat seeds usually have _____ beaks.
curved sharp
short thick
long thin
flat wide
Birds have large breastbones to _____.
anchor wing muscles
hold food
store fat
protect the heart
Why do many bird bones have hollow spaces?
grow faster
reduce weight
store food
hold water
What type of beak does this bird have?
long narrow
flst
short think
hooked
Hummingbirds have long narrow beaks to _____.
drink nectar
catch fish
cut meat
crack seeds
What are bird wings adapted from?
legs
tails
fins
forelimbs
Archaeopteryx had features of both _____.
reptiles and birds
fish and birds
insects and birds
mammals and reptiles
What body part provides power for flight?
legs
wing muscles
feathers
eyes
Look at the fossil. What early bird is this?
Duck
Archaeopteryx
Eagle
Seagull
Human arms and bird wings are similar because they _____.
are used for flying
have feathers
look the same
have the same evolutionary origin
Birds are classified as _____.
reptiles
vertebrates
insects
amphibians
Wings are curved on top to create _____.
lift
sound
heat
speed
Ducks have _____ beaks.
thin pointed
short curved
long sharp
broad flat
How many digits does a bird wing have?
four
three
five
two
The bird’s tail helps it _____ in flight.
eat food
change direction
keep warm
sleep