Get ready to brush feathers with the freakiest denizens of the winged world as we look at the planet's wackiest and most fearsome fliers.

A look at weird animals, from those that fend off predators by squirting blood from their eyes, to those which eat their partners after mating

Hermaphrodite flatworms, a master-of-disguise octopus and a fish that 'walks' on dry land are among the unusual underwater critters examined.