I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "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."? 

What types go the very farthest for increased temperatures?