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Montana Field Guide

Montana Field Guides

Freckled Stone - Perlesta placida

Native Species

Global Rank: G5
State Rank: SNR

Agency Status


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General Description
This species of the family Perlidae is a predaceous stonefly, eating other aquatic insects-especially midges, blackflies and small mayflies. They live on the cobbles and boulders of medium to fast flowing streams.

Food Habits
Merritt and Cummins (1996) report that members of the families, Perlidae and Perlodidae, are largely predators eating other aquatic invertrebrates, especially Diptera (Chironomidae and Simuliidae, midges and blackflies) and Mayflies.

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Citation for data on this website:
Freckled Stone — Perlesta placida.  Montana Field Guide.  .  Retrieved on , from