most fearsome. Leaving parents, searching for food, building a home, finding a mate; each day brings a new test, a challenge for even the fittest and best adapted animal. Trials of Life surveys the whole of the animal kingdom - mammals and fishes, birds and reptiles, insects and amphibians, crabs and jellyfish - from all over the world © ... Earth insatiable appetite national geographic trials Antarctic life parenthood insects birds wild naturalist journey trilogy david attenborough creatures ...