A similar situation occurs with waders (called shorebirds in North America). Many species, such as dunlin Calidris alpina and western sandpiper Calidris mauri, undertake long movements from their Arctic breeding grounds to warmer locations in the same hemisphere, but others such as semipalmated sandpiper C. pusilla travel longer distances to the tropics in the Southern Hemisphere. COUNT 4
QSN1 What are waders called in North America? ANS1 shorebirds QSN2 Where do dunlin Calidris alpina migrate to? ANS2 warmer locations in the same hemisphere QSN3 Where do semiplamated sandpiper C. pusilla migrate to? ANS3 the tropics in the Southern Hemisphere QSN4 Where do western sandpiper Calidris migrate from? ANS4 Arctic breeding grounds