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1:23
A series producer for "Spy in the Wild" recalls the humorous behavior of some wild chimps.
1:28
Staring down a half-ton Nile croc isn't for the faint of heart.
1:21
Spy gorilla witnesses gorillas singing, a phenomenon caught on camera for the first time.
3:00
Not everyone shows this gorilla troop leader the respect he deserves.
1:54
Yakutian horses have evolved to be able to withstand extremely cold temperatures.
2:12
See how a herd of reindeer move together like a swirling cyclone as a form of defense.