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Promoting the enjoyment, study, and conservation of Wisconsin's birds.

Online Guide to Wisconsin Bird Eggs

This searchable database is designed to assist in the identification of bird eggs for species that breed in Wisconsin and nearby states. CAUTION: See WBBA II Handbook for guidance on handling eggs/nests.

Cornell Lab of Ornithology’s NestWatch Program

The “Learn” tab of the NestWatch website has many great resources, including this one. CAUTION: WBBA II is not associated with the NestWatch Program. Please follow WBBA II field and data entry protocols.