▁ ▁In ▁specific ▁groups ▁ ▁D ifferent ▁kinds ▁of ▁animal ▁migr ate ▁in ▁different ▁ways . ▁ ▁In ▁birds ▁ ▁Appro xim ately ▁ 1 , 8 0 0 ▁of ▁the ▁world ' s ▁ 1 0 , 0 0 0 ▁bird ▁species ▁migr ate ▁long ▁distances ▁each ▁year ▁in ▁response ▁to ▁the ▁seasons . ▁Many ▁of ▁these ▁migr ations ▁are ▁north - s outh , ▁with ▁species ▁feed ing ▁and ▁bre eding ▁in ▁high ▁northern ▁lat itudes ▁in ▁the ▁summer , ▁and ▁moving ▁some ▁hundreds ▁of ▁kilometres ▁south ▁for ▁the ▁winter . ▁Some ▁species ▁extend ▁this ▁strategy ▁to ▁migr ate ▁ann ually ▁between ▁the ▁Northern ▁and ▁Southern ▁Hem is pher es . ▁The ▁Ar ctic ▁t ern ▁is ▁famous ▁for ▁its ▁migration ; ▁it ▁f lies ▁from ▁its ▁Ar ctic ▁bre eding ▁grounds ▁to ▁the ▁Ant ar ctic ▁and ▁back ▁again ▁each ▁year , ▁a ▁distance ▁of ▁at ▁least ▁, ▁giving ▁it ▁two ▁sum mers ▁every ▁year . ▁ ▁In ▁fish ▁ ▁Most ▁fish ▁species ▁are ▁relatively ▁limited ▁in ▁their ▁movements , ▁remaining ▁in ▁a ▁single ▁ge ographical ▁area ▁and ▁making ▁short ▁migr ations ▁for ▁winter ing , ▁to ▁spawn , ▁or ▁to ▁feed . ▁A ▁few ▁hundred ▁species ▁migr ate ▁long ▁distances , ▁in ▁some ▁cases ▁of ▁thousands ▁of ▁kilometres . ▁About ▁ 1 2 0 ▁species ▁of ▁fish , ▁including ▁several ▁species ▁of ▁sal mon , ▁migr ate ▁between ▁salt water ▁and ▁fresh water ▁( they ▁are ▁' di ad rom ous '). ▁ ▁For age ▁fish ▁such ▁as ▁her