Discover how weirdness is baked into some animals' DNA from birth. Check out the bowerbird's mate-attracting dance moves, the Christmas Island crab's traffic-dodging prowess, and the sockeye salmon's uphill swimming skills.

A look at the abilities that give some animals an edge in life, including fireflies' flashes, the tarsier's night vision, the mantis shrimp's knockout punch, and the saltwater croc's prey-detecting pressure sensors.

Meeting nature's most wanted to see why some species don't get the respect they deserve, including the great white shark's electrical sensors, the razor-sharp limbs of the dead leaf mantis, and the zombie-creating powers of cordyceps fungi.

Unravel strange alliances that ensure mutual success in the wild. Explore the partnership between clownfish and anemones, watch oxpeckers keep savannah residents healthy, and review the quid-pro-poo agreements of dung beetles and pitcher plants.

Watch the cannibalistic Portia spider devour the competition, uncover the bloodthirsty side of cuddly koalas and catch an epic giraffe battle.

Get inside the toughest gangs that roam the Earth and see what true grit looks like in the wild. Chase a band of marauding locusts, watch the coconut octopus ambush its next meal, and meet a flock of finches who've developed a taste for blood.