Unique study concludes that migratory birds move away from diseases to raise their young

(Natural News) Swedish researchers have found that European migratory songbirds leave their warm but disease-laden homes in the tropics to raise their vulnerable young in the healthier environs of Europe. This way, according to an article on ScienceDaily, their species could make do with less robust but also less costly immune systems. The University of Lund researchers came across…

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