PhysOrg Posted January 15, 2021 Share Posted January 15, 2021 Millions of birds travel between their breeding and wintering grounds during spring and autumn migration, creating one of the greatest spectacles of the natural world. These journeys often span incredible distances. For example, the Blackpoll Warbler, which weighs less than half an ounce, may travel up to 1,500 miles between its nesting grounds in Canada and its wintering grounds in the Caribbean and South America.View the full article Quote Link to comment Share on other sites More sharing options...
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