The Insect of the Week: The Silverspotted Skipper

In our latest series, Princeton Birds & Nature will highlight a new insect as seen in one of our titles, Garden Insects of North America: The Ultimate Guide to Backyard Bugs, now available in its second edition. From tiny earthworms to creepy cockroaches, and even beautiful butterflies, this new series will thrust bugs out of the backyard and into the spotlight.

Our inaugural post is adapted from pages 138-139 of Garden Insects of North America:

The Silverspotted Skipper is the most commonly encountered skipper, found throughout most of the southern border provinces of Canada and most of the continental U.S., except the Great Basin and west Texas. Adults are light brown, heavy-bodied butterflies with a wingspan ranging from 1. to 2⅝ inches. The overall color of the wings is brown with a yellow-brown band, but the underside of the lobed hindwing has a metallic silver band.

Larvae develop on wisteria and various leguminous plants such as black locust, honeylocust, false indigo bush, soybean, (Amorpha) and Cassia species. A full-grown larva is about 2 inches long. It has a dark reddish brown head with large yellow eye patches. The prothoracic shield is brown and the abdomen is yellow with darker transverse stripes and spots.

A silverspotted skipper (Epargyreus clarus) perched on a leaf, where they tend to create nests of eggs.

During egg laying, females alight on potential host plants to attach single eggs to leaves. The eggs are green with a red top. After hatching, the young larvae make shelters on the apical halves of leaves by cutting a flap on the leaf margin, folding it over and attaching it with silk. Larger larvae often silk several leaves together to form shelters. They leave the shelters only to feed or to make larger shelters. When mature, the larvae pupate inside the leaf nest. The pupal stage gives rise to summer adults, but pupae formed in the fall spend the winter in the leaf nests. In the more northern parts of its range, one generation is normal, but three to four generations can occur in southern states.

Garden Insects of North America: The Ultimate Guide to Backyard Bugs
Second Edition
By Whitney Cranshaw & David Shetlar

This second edition of Garden Insects of North America solidifies its place as the most comprehensive guide to the common insects, mites, and other “bugs” found in the backyards and gardens of the United States and Canada. Featuring 3,300 full-color photos and concise, detailed text, this fully revised book covers the hundreds of species of insects and mites associated with fruits and vegetables, shade trees and shrubs, flowers and ornamental plants, and turfgrass—from aphids and bumble bees to leafhoppers and mealybugs to woollybears and yellowjacket wasps—and much more. This new edition also provides a greatly expanded treatment of common pollinators and flower visitors, the natural enemies of garden pests, and the earthworms, insects, and other arthropods that help with decomposing plant matter in the garden.

Designed to help you easily identify what you find in the garden, the book is organized by where insects are most likely to be seen—on leaves, shoots, flowers, roots, or soil. Photos are included throughout the book, next to detailed descriptions of the insects and their associated plants.

An indispensable guide to the natural microcosm in our backyards, Garden Insects of North America continues to be the definitive resource for amateur gardeners, insect lovers, and professional entomologists.

  • Revised and expanded edition covers most of the insects, mites, and other “bugs” one may find in yards or gardens in the United States and Canada—all in one handy volume
  • Features more than 3,300 full-color photos, more than twice the illustrations of the first edition
  • Concise, informative text organized to help you easily identify insects and the plant injuries that they may cause


This post is part of a series, explore additional posts here