Some insects feed on Juncus spp. (Rushes), including Plateumaris pusilla (Leaf Beetle sp.), Limotettix cuneatus (Leafhopper sp.), Macrosteles potoria (Leafhopper sp.), larvae of Eutomostethus luteiventris (Sawfly sp.), and larvae of Archanara subflava (Subflava Sedge Borer Moth). Of these, the larvae of the preceding sawfly species are associated with the Soft Rush in particular. It is possible that some wetland and songbirds feed on the seed capsules of wetland rushes; if so, their importance as a food source is minor. Among mammalian herbivores, Muskrats are known to feed on the foliage and rootstocks of Soft Rush and other rushes occasionally. Because Soft Rush is fairly tall and can form dense colonies, it has the capacity to provide significant cover and nesting habitat for wetland birds and other kinds of wildlife. Because the tiny seeds can cling to the feathers or muddy feet of ducks and other wetland birds, these animals help to distribute this rush to new wetland sites.