Brown Trout (Salmo trutta)

OTHER NAMES: N/A
Latin Etymology: Salmo ("salmon") trutta ("trout")

Adult Brown Trout (Salmo trutta) at Market Deeping, Lincolnshire, UK - May 2026

Featured Subspecies: Probably Salmo trutta fario
Weight: 1-20kg  /  Length: 100cm
NO UK STATUS / IUCN Red List: Least Concern 

A common and widespread Eurasian fish that, due to its popularity has been introduced worldwide resulting in it becoming a significant invasive species in various places outside its native range. It hsa three ecotypes as subspecies - the river, lake and sea trout which have different life cycles depending on their habitat of choice.

Related Species: 
Order: Salmoniformes
Family: Salmonidae
Genus: Salmo
SUBSPECIES: S. t. fario, S. t. trutta, S. t. lacustris
 
- Sighting Locations -

UNITED KINGDOM - A common and widespread resident
- Seen in various locations

Further Notes: BirdForum Opus, IUCN Red List, RSPB, Wikipedia, Xeno-canto