Range and Identity
Percopsis transmontana occurs in the Columbia drainage in Idaho, Washington and Oregon. This basin-based description is more precise than a general Pacific Northwest range. A record from a neighboring coastal river would require its own identification and occurrence evidence.
Habitat and Behavior
Adults use quiet backwaters and pool margins in rivers of different sizes. They are usually associated with sand and nearby vegetation. These sites can be part of a much larger flowing river while offering gentler conditions than its main channel.
Food and Life History
The reported maximum length is 9.6 centimeters total length, and seven centimeters is a common reference. A maximum age of six years has been reported. The account does not establish a regular long-distance migration, so local habitat use should not be presented as evidence of one.
Field Note
Describe the river margin as well as the river name. A sheltered vegetated backwater conveys far more about a Sand Roller record than the broad label of river habitat.
All Lakes With Sand Roller
Browse lakes and reservoirs with documented Sand Roller records, listed alphabetically. Records do not establish current abundance or public access. Check the evidence and managing authority for the water you choose.
No published lakes are currently linked to this species in our confirmed records.