ScienceDaily Posted April 10, 2018 Share Posted April 10, 2018 In a unique study, researchers have mapped the origins of migratory birds. They used the results to investigate and discover major differences in the immune systems of sedentary and migratory birds. The researchers conclude that migratory species benefit from leaving tropical areas when it is time to raise their young -- as moving away from diseases in the tropics enables them to survive with a less costly immune system. View the full article Quote Link to comment Share on other sites More sharing options...
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