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Science

Across
..................birds have a special adaptations for resting on branches
An ostrich is a .................. bird
A narrow-edged tooth at the front of the mouth
The act of grooming and maintaining their feathers
An upward force on an object that moves in a fluid
The time between conception and birth
Provides insulation to adult birds
.................... is any thin material that creates a partition
A pointed tooth between the incisors and premolars of a mammal
Use to refer to birds that live on or around water
Down
Small feathers that form the outline of and adult birds
............... live in the coldest ocean, and hottest desert
Do most of their development in the womb
The members of which are related to the ancestors of mammals
An animal that feeds on flesh
The milk-producing gland of female mammals
The shed of old feathers
Are also called raptors
After the hatch, the parent bird...................... their young