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As a heat wave is impacting the state, Connecticut's Extreme Hot Weather Protocol is activated through at least Sunday, July 5. Cooling centers are available statewide. To find the nearest location, visit www.211ct.org or call 2-1-1. [READ THE UPDATE]

Endangered, Threatened, and Special Concern Species by Taxonomic Group

Species are categorized as being Endangered (E), Threatened (T), or Special Concern (SC) within each taxonomic group. The lists are alphabetized by the species' scientific name.

Content last review in July 2026.