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

eBird Reporting

A simple and intuitive online tool that allows you to submit observations, maintain personal bird records, and visualize data with interactive maps, graphs, and bar charts. Launched in 2002 by the Cornell Lab of Ornithology and National Audubon Society, eBird has revolutionized the way that the birding community reports and accesses information about birds. A birder simply enters when, where, and how they went birding, then fills out a checklist of all the birds seen and heard during the outing. Wisconsin has two state-based eBird portals: the Wisconsin eBird portal and the Atlas eBird portal. Read how you should use each portal here. Reporting Sensitive Species to eBird

There are certain cases where it may not be best to have detailed information on a bird sighting available to the general public. These include birds that can be very sensitive to disturbance, rare nesting species, or cases where birder pressure could cause negative effects. Learn how to report sensitive species.

Rare Bird Reporting

The WSO Records Committee regularly revises its list of species requiring review and modifies the forms for documenting rare birds. After sighting a rare bird, please consult the Review List to see if the bird in question is considered a rare species in the state. If you believe that you have seen a bird out of season, please consult the WSO Arrival and Departure Dates document. If the species is determined to be either a rare species or record early or late, then fill out the online Rare Bird Documentation Form. Copies of this form will be sent to the WSO Records Committee members for review. All records for a season are reviewed and voted upon. Results of the review and vote are published in WSO's quarterly journal.

Rare Bird Documentation Forms

WSO Review List - indicates rare species that have occurred in Wisconsin but require documentation for acceptance into the state records.

WSO Arrival and Departure Dates – indicates the earliest arrival and latest departure dates for bird species occurring in Wisconsin.

Checklist of Wisconsin Birds - contains all of the valid species on the Wisconsin state list.

WSO Rare Bird Documentation Form - use this form to document all species on the WSO Review List, any species not listed in the Checklist of Wisconsin Birds, or any species determined to be seasonally rare. To determine whether a species is seasonally rare, review the WSO Arrival and Departure Date document and check the “Finds between” time period for each species (indicated in red).

Wisconsin Rare Bird Records – provides a detailed summary of all accepted records for the Wisconsin Review List species.

Seasonal Reporting

WSO publishes comprehensive seasonal reports for all bird species in the state. These reports are generated from the thousands of bird observations that are submitted though eBird, social media sites, and the state birding listserv. WSO’s Field Note Compilers then assemble this information into a meaningful seasonal summary that is published in our quarterly journal. The Passenger Pigeon article “Bird Reports, Going With The Flow” details the WSO bird reporting workflow. To contribute your data directly to one of our Field Note Compilers, please email the Single County Report Form to reports@wsobirds.org

Seasonal Report Due Dates

Spring SeasonMarch 1 – May 31Due June 10
Summer SeasonJune 1 – July 31Due August 10
Fall seasonAugust 1 – November 30Due December 10
Winter seasonDecember 1 – February 28/29Due March 10