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.

Step into the ring with nature's top brawlers, who use violence to get what they need. Watch the cannibalistic Portia spider devour the competition, uncover the bloodthirsty side of cuddly koalas, and catch an epic neck-whipping giraffe battle.

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.

Meet nature's most wanted and see why the baddest of the bad don't get the respect they deserve. Admire the great white shark's electrical sensors, the razor-sharp limbs of the dead leaf mantis, and the zombie-creating powers of cordyceps fungi.

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

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