Common Wood Nymph Butterfly - Cercyonis pegala
Live adult butterflies photographed in the wild at northern Illinois  Nymphalidae / Subfamily: Satyrinae - Satyrs & Wood Nymphs
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Common Wood Nymph Butterfly
I can tell you from bitter experience, this is one of the most elusive butterflies to photograph. They are very wary and almost never stop moving for very long. I consider myself lucky after many hours of chasing these creatures to have these few images.
 
Identification: Geographically variable. Wings are brown. Upperside of forewing has 2 large yellow-ringed eyespots. Lowerside of hindwing has a variable number of small eyespots. Southern and coastal butterflies are larger and have a yellow or yellow-orange patch on the outer part of the forewing. Inland butterflies are smaller and have the yellow forewing patch reduced or absent.

Life history: Males patrol for females with a dipping flight through the vegetation. In late summer, females lay eggs singly on host plant leaves. Caterpillars hatch but do not feed, instead hibernating until spring.

Flight: One brood from late May-October. Females emerge later than males. Wing span: 1 3/4 - 3 inches (4.5 - 7.6 cm). Caterpillar hosts: Purpletop (Tridens flavus) and other grasses.
Adult food: Rotting fruit, flower nectar.
Habitat: Large, sunny, grassy areas including prairies, open meadows, bogs, and old fields.
Range: Southern Canada and the continental United States except for most of the Southwest and Texas, southern peninsular Florida, and northern Maine.
Conservation: Isolated populations in Great Basin wetlands may be of concern.  [1]
Common Wood Nymph
References
  1. Opler, Paul A. Butterflies and Moths of North America
  2. National Audubon Society Field Guide to Insects & Spiders Chanticleer Press 1980
  3. Eric Eaton & Ken Kaufman, Kaufman Field Guide to Insects of North America
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Order Lepidoptera, which contains both butterflies and moths, includes at least 125,000 known species including 12,000 in North America. Butterflies are revered for their brightly colored wings and pleasing association with fair weather and flowers.
Learn to identify many of the American Midwest's common species through descriptions and large diagnostic photos of live, wild specimens.
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