Bird Crossword Puzzle Answer

Bird

Across

Down

All body systems in birds have modifications that help them do this

Energy for migration comes from stored ' '

In a bird feather, this is the branch of a vine

Used to store air and keep oxygating air even when exhaling

Birds bones are ' '

Birds that lay many eggs and incubate them for long periods to hatch ' ' young that can walk and get food as soon as they hatch

Birds do not have a urinary ' '

A bird scientist

Birds are ' ' because they make their own body heat

Feathers are made of this

divides lower portion of heart into 2 separate ventricles

Featherless patch of skin on abdomen

lower portion of stomache that helps knead and crusg food

This is larger for birds because of muscle coordination during flight

breastbone to which flight muscles are attached

a birds heart has 2 artria and 2 ' '

Birds only have ONE ovary and oviduct on the ' ' side of the body

The ' ' is made up of ileum and duodenum.

Enlargement of esophagus where food is stored and moistened

in birds, the eggs pass from oviducts into a multipurpose cavity called the ' ' before leaving the body

The air sacs in birds extend to their ' ' to make them more dense

Birds lose their feathers and replace them with this process

a nitrogen waste that bird's kidneys filter from the blood to the cloaca

Fused with collarbone that stabalize the shoulder joint during flight

Thin bird skin is covered with this

tubes that carries sperm from the testes to the cloaca

Bird brains have larger ' ' lobes in their brain for keener vision

A bird heart has this many chambers

The hard outer ' ' in an imniotic egg protects the embryo growing inside

1st chamber of the stomache where acid and enzymes digest food

Birds straighten and rub themselves with oil from this gland

Terminal fused vertabrae that support the tail feathers

In some birds, the crop secretes a nutricious milk-like liquid called ' '

Birds belong to this class

Birds ' ', or find their way, by the position of the stars and sun, geographical landmarks, and the Earth's magnetic field

Birds have this kind of fertilization

A bird egg has a ' ' carbonate in the shell to make it hard

egg with 4 membranes and outer shell

Birds use this to exhibit higher thinking skills

these kind of young are born naked, blind, and helpless

is at the base of the trachea and produces bird's song

Birds have this instead of teeth

The forelimbs of birds have been modified into this for flight

Bile made in liver is stored in this kind of bladder