North American Butterflies and Moths List

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Butterflies of North America

Butterflies of Delaware

Eyed Brown (Satyrodes eurydice)
JPG -- species photo

Eyed Brown (Satyrodes eurydice [Johansson])

Wing span: 1 1/2 - 2 7/16 inches (3.8 - 6.2 cm).

Identification: Upperside is light to medium brown with black eyespots. Underside of forewing has submarginal eyespots about the same size, usually touching or linked like a chain; dark line inside the hindwing's spot row is zigzagged.

Life history: The Eyed Brown flies weakly over and within low plant growth and perches frequently. Males patrol in vegetation and occasionally perch to court females. Eggs are scattered on many different plants. Caterpillars eat leaves; the third and fourth stages hibernate.

Flight: One brood from June-September.

Caterpillar hosts: Various sedges (Carex stricta, C. lupulina, C. bromoides, and C. trichocarpa) in the sedge family (Cyperaceae).

Adult food: Sap, bird droppings, and occasionally flower nectar.

Habitat: Open sedge meadows, freshwater marshes, slow-moving streams, cord grass swales in tallgrass prairie.

Range: Eastern North America from Nova Scotia south to Delaware and west to Saskatchewan and eastern Nebraska. Outlying populations in north-central Colorado, east-central Alberta, and northern Quebec.

Conservation: Smoky Eyed Brown (subspecies fumosus) is of concern in several states. It has The Nature Conservancy Global Rank of G3 - Very rare or local throughout its range or found locally in a restricted range (21 to 100 occurrences). (Threatened throughout its range).

Management needs: Monitor populations of subspecies fumosus and make conservation recommendations. Other subspecies have The Nature Conservancy Global Rank of G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.

Note: Subspecies fumosus has been considered a separate species in the past.


Opler, P. A. and G. O. Krizek. 1984. Butterflies east of the Great Plains. Johns 
     Hopkins University Press, Baltimore. 294 pages, 54 color plates.

Opler, P. A. and V. Malikul. 1992. A field guide to eastern butterflies. Peterson 
     field guide #4. Houghton-Mifflin Co., Boston. 396 pages, 48 color plates.

Scott, J. A. 1986. The butterflies of North America. Stanford University Press, 
     Stanford, Calif. 583 pages, 64 color plates.

Tilden, J. W. 1986. A field guide to western butterflies. Houghton-Mifflin Co., 
     Boston, Mass. 370 pages, 23 color 	plates.

Author: Jane M. Struttmann

State and Regional References:

Glassberg,  J.  1993.  Butterflies Through Binoculars: A Field Guide to 
     Butterflies in the Boston-New York-Washington Region.  Oxford Univ. Press, 
     New York, N.Y.  160 pp.
Opler, P.A. 1998. A field guide to eastern butterflies, revised format.
     Houghton Mifflin Co., Boston.     

Shapiro, A.M. 1966.  Butterflies of the Delaware Valley.  American Entomological
     Society Special Publication.  Philadelphia, PA.  79 pp. 

Woodbury, E.N.  1994.  Butterflies of Delmarva.  Delaware Nature Society, Inc.,
     Tidewater Publishers, Centreville, MD.  138 pp.  [NOTE: this book only 
     treats True Butterflies (Papilionoidea).  It does not treat Skippers
Eyed Brown (Satyrodes eurydice)
distribution map
map legend

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