U.S. Fish and Wildlife Service Northeast Region

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Hear from Deborah Cramer, author of The Narrow Edge: A tiny bird, an ancient crab, and an epic journey, who explains how the threatened red knot is an omen for how devastating ocean acidification can be.

Climate change may extensively reduce the red knot’s Arctic breeding habitat and the roosting habitats the knot uses as it migrates south along the eastern U.S. Credit: Greg Breese/USFWS

A changing climate could cause some serious problems for the rufa red knot, which we recently listed as a threatened species.

Beach restorations along New Jersey's Delaware Bay will help horseshoe crabs spawn in early May.

One might think a creature named the horseshoe crab would be naturally lucky–and in some ways it is. The prehistoric throwback has retained its basic physiology for around 350 million years, so it’s already far outlasted our own species on an evolutionary scale. Evolved as it may be, its luck has been challenged along the shores of the Delaware Bay.