Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Epargyreus clarus - Silver-spotted Skipper - Hodges#3870


The Butterflies of Iowa
By Dennis W. Schlicht, John C. Downey, Jeffrey C. Nekola
University of Iowa Press, 2007

Expanded phenotypic diagnoses for 24 recently named new taxa of Hesperiidae (Lepidoptera).
By Grishin, N.V.
The International Lepidoptera Survey - The Taxonomic Report. 8(1): , 2019
Grishin, N.V. 2019. Expanded phenotypic diagnoses for 24 recently named new taxa of Hesperiidae (Lepidoptera). The International Lepidoptera Survey - The Taxonomic Report. 8(1):

Notes on some skippers, with new records for the United States (Lepidoptera, Hesperiidae).
By Freeman, H.A.
Canadian Entomologist 77(11): 201-203., 1945
Freeman, H.A. 1945. Notes on some skippers, with new records for the United States (Lepidoptera, Hesperiidae). Canadian Entomologist 77(11): 201-203.

New Hesperiidae records for Texas and the United States.
By McGuire, W.W. & M.A. Rickard.
Journal of the Lepidopterists' Society 30(1): 5-11., 1976
Full PDF

McGuire, W.W. & M.A. Rickard. 1976. New Hesperiidae records for Texas and the United States. Journal of the Lepidopterists' Society 30(1): 5-11.

The Rio Grande Valley of Texas, located in the extreme southern section of the state and encompassing areas of essentially neotropical habitat, offers a unique opportunity for the study of Lepidoptera in the U.S.A. The authors have had the good fortune to collect this area rather frequently during the past several years and during that time some interesting and important new records of Hesperiidae have been obtained.

The Tent Caterpillars
By Terrence D. Fitzgerald
Cornell University Press, 1995
All aspects of the biology of tent caterpillars.
Comprehensive.

ISBN-13: 978-0801424564
ISBN-10: 0801424569

Butterflies of Oregon, Their Taxonomy, Distribution, and Biology
By Andrew D. Warren
C.P. Gillette Museum of Arthropod Diversity, Dept. of Bioagricultural Sciences and Pest Management, Colorado State University, 2005
408 pages

Book / paper is referenced extensively by other authors (Pyle, James, Nunnallee, etc.)
in their butterfly books about Cascadia / Pacific Northwest.

A Swift Guide to Butterflies of North America: Second Edition
By Jeffrey Glassberg
Princeton University Press, 2017
Publisher's Page
This is a revised second edition of the most detailed, comprehensive, and user-friendly photographic field guide to the butterflies of North America. Written by Jeffrey Glassberg, the pioneering authority on the field identification of butterflies, the guide covers all known species, beautifully illustrating them with 3,500 large, gorgeous color photographs—the very best images available. This second edition includes more than 500 new photos and updated text, maps, and species names. For most species, there are photographs of topsides and undersides, males and females, and variants. All text is embedded in the photographs, allowing swift access in the field, and arrows point to field marks, showing you exactly what to look for. Detailed, same-page range maps include information about the number of broods in each area and where strays have been recorded. Color text boxes highlight information about habitat, caterpillar food plants, abundance and flight period, and other interesting facts. Also included are a quick visual index and a caterpillar food plant index. The result is an ideal field guide that will enable you to identify almost every butterfly you see.

Butterflies of the Pacific Northwest
By Robert Michael Pyle, Caitlin C. LaBar
Timber Press, Inc., 2018
Publisher's Page
This book is an updated and revised version of The Butterflies of Cascadia.
A must-have for nature lovers in the Pacific Northwest Butterflies of the Pacific Northwest is an easy-to-use and beautifully illustrated field guide to more than 200 of the region’s most common and distinctive butterflies. Profiles include preferred common name for both genus and species, conservation status, the look and distinguishing traits of each butterfly, habitat and range, and much more. Additional information includes a brief introduction to how butterflies work and details on ecology and conservation.