The Butterfly Conservancy
www.butterflywings.com/garden.html
Butterfly Gardening and Conservation, Missouri Department of Conservation
www.conservation.state.mo.us/nathis/insects/butterf/butterf.html
Butterfly Guide
www.butterflies.com/guide.html
The Butterfly Website
www.butterflywebsite.com/index.htm
Electronic Resources on Lepidoptera
www.chebucto.ns.ca/Environment/NHR/lepidoptera.html
Gardening Naturally, The Natural Gardener
www.bbg.org/gardening/natural/bird/intro.html
The Hummingbird Society
www.hummingbird.org/hummer.htm
Michigan State University Extension
www.msue.msu.edu/vanburen/trapsweb.htm
National Bird-Feeding Society
The National Wildlife Federation
www.nwf.org/habitats/backyard/basics.cfm
North Dakota State University Extension Service
University of Arizona
http://insected.arizona.edu/bflyrear.htm
University of Illinois Extension, Horticulture Solutions Series
www.ag.uiuc.edu/—robsond/solutions/horticulture/docs/ironchlr.html
University of Minnesota, Butterfly Gardening, by Vera Krischik