A Comprehensive Annotated List of the Butterflies
Sheyenne National Grassland Butterfly Survey
The Saytyrs & Wood Nymphs
Northern Pearly Eye Enodia anthedon (Clark), 1936 Habitat: Deep, shady woodlands; often perches on trunks; drinks sap Larval food: Grasses, incl. Leersia, Hystix, Phalaris, Schizachne Adult flight: One brood in July References: Royer 80, Opler & Krizek 176, Scott 234 Confirmed occurrences: 26 Jun 1995 in NE1/4 S12 T135N R53W (south end of Mirror Pool Woods), and S1/2 S2 T135N R53W (cattle exclosure in RNA); 2 Jul 1995 in S1/2 S2 T135N R53W (cattle exclosure in RNA). Northern Eyed Brown Satyrodes eurydice (Johansson), 1763 Habitat: Open sedge meadows and marshlands Larval food: Primarily Carex spp. Adult flight: One brood, primarily in July References: Royer 80, Opler & Krizek 178, Scott 235 Confirmed occurrences: 26 Jun 1995 in S1/2 S2 T135N R53W. Little Wood Satyr Megisto cymela (Cramer), 1777 Habitat: Shady woodlands, in ND often near hazel stands Larval food: Dactylis glomerata, doubtless other grass species Adult flight: One brood, primarily in June References: Royer 81, Opler & Krizek 184, Scott 237 Confirmed occurrences: 26 Jun 1995 in NE1/4 S12 T135N R53W (abundant at south end Mirror Pool Woods along trail in sumac), and S1/2 S2 T135N R53W in woods; 2 Jul 1995 in S1/2 S2 T135N R53W in woods. Inornate Ringlet Coenonympha inornata(Edwards), 1861 Habitat: Open, grassy meadows and native prairies Larval food: Doubtless many grass species are utilized Adult flight: One brood, primarily in late May and June References: Royer 81, Opler & Krizek 186, Scott 239 (as tullia) Confirmed occurrences: 12 Jun 1995 on transect, NW1/4 S35 T135N R54W and S13 T134N R54W; 13 Jun 1995 on transect, NW1/4 S35 T135N R54W, S2 T135N R53W, and S1/2 S20 and N1/2 S29 T135N R52W; 25 Jun 1995 on transect, NW1/4 S35 T135N R54W and S1/2 SW4 S21 T134N R53W; 26 Jun 1995 on transect and elsewhere in N1/2 S27 T134N R54W, W1/2 S35 T135N R54W, and SW1/4 S1 T134N R54W; 2 Jul 1995 in S1/2 S2 T135N R53W and W1/2 S35 T135N R54W. Common Wood Nymph Cercyonis pegala (Fabricius), 1775 Habitat: Native prairies and grasslands Larval food: Andropogon, Stipa; many grasses are no doubt utilized Adult flight: One brood, primarily in July and August References: Royer 82, Opler & Krizek 186, Scott 240 Confirmed occurrences: 2 Jul 1995 in S1/2 S2 T135N R53W and W1/2 S35 T135N R54W; 31 Jul 1995 on transect and elsewhere in N1/2 S27 T134N R54W, also in S1/2 S2 T135N R53W; 1 Aug 1995 on transect, in NW1/4 S14 T134N R53W, and in W1/2 S35 T135N R54W; 16 Aug 1995 on transect and elsewhere in N1/2 S27 T134N R54W. Varuna Arctic Oeneis uhleri varuna (W. H. Edwards), 1882 Habitat: TL = "Plains of Dakota Territory"; well drained prairie slopes Larval food: Unknown grass sp. Adult flight: One brood, mid-May into June References: Royer 84, Ferris & Brown 284, Scott 250 Confirmed occurrences: Not recorded in the Sheyenne National Grassland in 1995, but reported from Ransom County in 1994. Rare this far southeast.
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