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3
|
All bird lay these
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5
|
Sitting on an egg to keep it warm and protect it
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7
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The hard outer covering of an egg
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8
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Group of animals of all the same species that nest together
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9
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These help protect a bird
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10
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Male birds often do this to attract a mate
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12
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When all the individuals of a species are gone forever
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1
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A bird that cannot fly
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2
|
Only the females incubate eggs in all species of birds
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4
|
Many songbirds eat these in the summer
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6
|
Coloring and behaviors that make it hard to be seen
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11
|
Many songbirds eat these in the winter
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13
|
Birds are warm blooded, just like mammals
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