PhysOrg Posted September 15, 2022 Share Posted September 15, 2022 A bay-breasted warbler weighs about the same as four pennies, but twice a year makes an extraordinary journey. The tiny songbird flies nearly 4,000 miles (6,437 kilometers) between Canada's spruce forests and its wintering grounds in northern South America.View the full article Quote Link to comment Share on other sites More sharing options...
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