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Montana Field Guide

Montana Field Guides

Common Forestfly - Zapada cinctipes

Native Species

Global Rank: G5
State Rank: SNR

Agency Status


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General Description
This is the most common genus of the family Nemouridae in the Rocky Mountains. Zapada species are found in almost every flowing water habitat in the northern Rocky Mountains and Z. cinctipes is the most vagile species in the whole group
The genus is distinguished by the presence of two pairs of cervical gills, one on the inside and one on the outside of the lateral cervical sclerites
Zapada species are abundant in accumulations of leaf material and probably act as shredders of allochthonous material in heterotrophic lotic ecosystems.

Species Range
Montana Range Range Descriptions


Observations in Montana Natural Heritage Program Database
Number of Observations: 186

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Food Habits
Merritt and Cummins (1996) report that members of this family are trophically shredder-detritivores; eating large particulate organic materials such as detritus, leaves and plants.

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Citation for data on this website:
Common Forestfly — Zapada cinctipes.  Montana Field Guide.  .  Retrieved on , from