North America

Female green anacondas are almost five times heavier than males.

Their huge size can make it difficult for them to move on land, however, in water they can move with stealth and ease.

The great grey owl is one of the world's most instantly recognisable birds of prey. The great grey owl is almost all feathers for insulation, underneath its body is no bigger than a tawny owl.

The grey wolf is the largest wild canid, or member of the 'dog' family. Grey wolves are social animals and the ancestor of all domestic dogs. In the wild they live in packs of 5–10 individuals and have a highly organised social structure.

Like most vultures, king vultures have a bald head to stop any feathers getting dirty whilst they are eating which also prevents a build up of bacteria.

King vultures are believed to mate for live, which can be around 30 years in the wild.

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