A cockroach will live nine days without its head before it starves to death.

The male penguin incubates the single egg laid by his mate. During the two month period he does not eat, and will lose up to 40% of his body weight..

Flocks of geese travel in long lines, flying in V-formations. As each goose flaps its wings, it creates an "uplift' for the others to follow, adding 70% greater flying range than flying alone .

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