The swans are generally found in temperate environments, rarely occurring in the tropics. Four (or five) species occur in the Northern Hemisphere, one species is found in Australia  and New Zealand and one species is distributed in southern South America. They are absent from tropical Asia,... 

Today we are going to dedicate a post to world’s animals because according to an update of the Red List half the world’s animals are declining in population and more than a third are probably threatened with extinction. So please try to keep wildlife safe, they are the beauty of our world....