| countershading | | process during which a penguin loses and replaces its feathers |
| seventeen | | this penguin species lives along the equator |
| krill | | main food item for antarctic penguins |
| regurgitation | | form of camoflage used by penguins |
| nictitating | | young penguins huddle together in these for warmth |
| spheniscidae | | all penguins belong to this family |
| molting | | how the parent penguins feed their chicks |
| solid | | unlike most birds, penguins have _____ bones |
| galapagos | | period during which the parents keep the eggs warm |
| incubation | | number of penguin species living on earth |
| southern | | the clear membrane protecting a penguin's eyes |
| gestation | | all penguins live in this hemisphere |
| blubber | | period during which the eggs grow inside the female penguin |
| creches | | penguins have a layer of this under their skin for warmth |