Official guide
Brook Trout (Salvelinus fontinalis)
U.S. Fish and Wildlife Service
Identifies the habitat signature worth walking to: small spring-fed streams and ponds over sand or gravel, spawning where groundwater percolates up through the gravel. Separates the three forms — inland, Great Lakes coasters and sea-run salters — which behave differently.
Why it made the list: Fetched 2026-09-08: page loads on fws.gov in the species-profile layout with the spring-fed habitat text, the September–October spawn and the three-population breakdown.
Open resource