Fish
Logperch
Percina caprodes · also called logperches
A logperch works its way along a gravel streambed, using its slightly upturned snout to flip aside small stones one at a time. Whatever insect larvae were hiding underneath rarely get much warning before this particular fish finds them.
Overview
The logperch, Percina caprodes, is a member of the darter family native to freshwater lakes and streams across central and eastern North America. Its distinctive rock-flipping foraging technique and relatively large size for a darter make it one of the more behaviourally interesting small fish species in its range.
A fish that turns over its own food
Where most small freshwater fish simply search visible surfaces for prey, the logperch actively rearranges its own foraging environment, physically flipping rocks aside to access food hidden from view entirely.
Status
Least Concern — widespread and stable across suitable freshwater habitat throughout central and eastern North America.
Logperch: common questions
Why does the logperch flip over rocks?
A logperch uses its elongated, slightly upturned snout to flip small rocks and pebbles aside, exposing hidden invertebrate prey underneath, a distinctive foraging technique that allows it to access food sources other similarly sized freshwater fish generally cannot reach as effectively.
Is the logperch related to perch?
The logperch belongs to the darter family, Percidae, the same broader family that includes true perch and walleye, making it a genuine relative, though logperch and other darters are generally smaller and more bottom-oriented than the larger, more open-water perch species within the same family.
How big does a logperch get?
The logperch is one of the larger species within the darter family, generally reaching a greater size than many of its smaller, more brightly coloured darter relatives, though it remains modestly sized compared with larger perch family members such as yellow perch or walleye.
Where does the logperch live?
The logperch is native to freshwater lakes, rivers, and streams across central and eastern North America, generally favouring clear water with a gravel or rocky bottom that supports its distinctive rock-flipping foraging technique.