Nature - Season 26 - Eps 7: Crash: a Tale of Two Species
The link between the horseshoe crab, which has remained the same for some 350 million years, and the red-knot shorebird, is explored. The horseshoe crab's spawning grounds, the Delaware Bay, are an important feeding ground for the red knots on their way from Tierra del Fuego to the Arctic. Included: how biologists connected a drop in the red-knot population to a similar decrease in the crabs. Also: how horseshoe-crab blood is used to test human medicines.
About Nature

Title: Nature
First Air Date: 1982-10-10
Last Air Date: 2025-05-07
Status: Returning Series
Rating: 8.1/10 (from 37 votes)
Language: EN
Seasons: 44
Total Episodes: 679
Network: PBS
Genres: Documentary, Family
Production Companies: Thirteen, Coneflower Films Studios, Trebitsch Produktion International GmbH, Rubin Tarrant Productions
Synopsis
Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy Antarctica. The show's primary focus is on animals and ecosystems around the world. A comic book based on the show, meant to be used an as educational tool for kids, was briefly distributed to museums and schools at no cost in the mid-2000s.