NATURE ANIMALS The animals, like the plant life are prolific, colourful and alluring. With some exceptions, many of the mammals and birds you will see - both on land and out at sea - are also native to the UK. What differs is the variety of reptiles and insects that come to see you. But before cursing them, remember all animals play a vital role in keeping our ecosystems healthy. Snakes control rodent populations whilst insects enrich our soil and provide food for larger animals. The same goes for the land crabs you will find enjoying the sun on rocks. Although they can inflict a memorable pinch, they pose no threat to humans.