Blackpoll warbler songbird must fly 2,500km in 3 days – or die!

Scientists reveal how a bird that weighs the same as 3 teaspoons of sugar complete their epic migration without burning out.

Scientists have long wondered how the Blackpoll warbler (Setophaga striata), a songbird that weighs a mere 12g – about 3 teaspoons of sugar – complete their arduous non-stop flight over the Atlantic Ocean from forests in New England and eastern Canada to South America every year to escape the winter.