National Geographic: The migratory red knot is getting smaller due to climate change, making it harder for the threatened birds to find the best food.
The red knot shorebird is a tough, long-distance flier that migrates yearly from the Arctic into the Southern Hemisphere and back. For decades, the bird has been at risk because its food sources, such as crab eggs, have declined in the feeding grounds along its migratory route.
Now an alarming discovery by an international team of scientists, published this week...