ScienceDaily Posted August 31, 2015 Share Posted August 31, 2015 Among birds, the line between species is often blurry. Some closely related species interbreed where their ranges overlap, producing hybrid offspring. In the coastal marshes of New England, this has been happening between the Saltmarsh Sparrow and Nelson's Sparrow. Research finds that appearance alone is not enough to identify these hybrid zone birds. Read the full article on ScienceDaily Link to comment Share on other sites More sharing options...
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