ESA Listings Summary

Graphs, tables, and maps that summarize listings under the ESA.

Go To App

The U.S. Fish and Wildlife Service makes basic information about species listed under the Endangered Species Act (ESA) available through their ECOS website. This information is invaluable, but unfortunately, it is difficult to understand the big picture of ESA listings and answer questions like:

  • How has the number of threatened or endangered species changed through time?
  • How many birds or clams are listed and in what parts of the country are they listed?
  • Which U.S. counties have the most species, and what are those species?

We’ve created a small web application that can help. There, you can find some top-level numbers on listings, see how different groups of species are listed in different parts of the country, and click on your home county (or any county) to find the ESA-listed species in that county. All of this is based on data we collect from ECOS every night, so the information stays up-to-date. Please use the app–embedded below or, better yet (for layout), on its main page–and let us know what you think!


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