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2:25
A female crocodile carries her babies to safety between her deadly teeth.
1:21
Spy gorilla witnesses gorillas singing, a phenomenon caught on camera for the first time.
2:07
Spy puffin is surrounded by males waiting for their long-lost partners to return.
2:53
Spy koala captures two male koalas fighting, a moment rarely filmed.
3:21
Back from hunting, these penguin parents must tiptoe around elephant seals to feed babies.
2:37
Learn how the destructive force of fire is necessary for new life.
3:06
Sierra newt males battle it out for the chance to mate.
2:00
Author Helen Macdonald talks about her role in NATURE's "H is for Hawk: A New Chapter".
2:00
NATURE producers discuss the making of SPY IN THE WILD.
