Birds

• All About Birds - Cornell Lab of Ornithology
• The Audubon Society
• eBird

Butterflies & Other Insects

• BugGuide
• Butterflies & Moths of North America
• Caterpillars of Eastern Forests
• Dragonflies & Damselflies of Missouri
• Monarch Watch
• North American Butterfly Association
• Xerces Society

Gardening

• Butterfly Gardening.org
• University of MO Weed ID Guide

Herptiles

• MDC Guide to Reptiles and Amphibians of MO
• North American Amphibian Monitoring Program

Native Plants & Wildflowers

• Midwest Invasive Plant Network
• Missouri Flora
• Missouri Native Plant Society
• Missouri Prairie Foundation
• Seedling ID Guide

Nature in General

• MDC Field Guides
• MDC MO Endangered Species
• MDC Events
• Missouri Natural Heritage

Other Areas of Interest

• MDC Conservation Areas
• Hannibal Parks & Recreation
• Mark Twain Lake
• Mark Twain State Park
• Missouri Stream Team