The Great Wisconsin Birdathon is Wisconsin’s largest fundraiser for bird conservation. It’s like a walk-a-thon style fundraiser, but instead of logging miles, our participants are logging bird sightings! Each year, bird enthusiasts from across the state raise support and awareness for bird conservation by forming a team or donating to a team.

Birdathon teams can participate any day from April 15th to June 15th, and donations are accepted from March 15th to June 30th. Participation is free and all skill levels are welcome to join.

How, when, and where you bird is up to you. While most teams choose to compete over a 24-hour period, many teams opt to bird over the course of a weekend, a week, or even the entirety of the Birdathon! Teams can bird anywhere in Wisconsin – a backyard, a local park, or a route to hit all their favorite birding hot spots. Both novice and expert birders can have fun and make a difference in protecting birds – the Birdathon is for everyone!

The Great Wisconsin Birdathon began in 2012 and since then has raised more than $900,000 for bird protection in Wisconsin.

The funds are collected and managed by the Natural Resources Foundation of Wisconsin through the Bird Protection Fund.

Projects supported by the Bird Protection Fund include conservation of Wisconsin’s most threatened and endangered bird species; creation and protection of critical breeding, stopover, and overwintering habitat; research and monitoring; and education and outreach.

Welcome to Wisconsin Fat Bird Week

Welcome to the Natural Resources Foundation of Wisconsin’s first ever Fat Bird Week! What better way to celebrate Wisconsin’s native birds than by admiring the chonkiest of the chonkers? Because after all, a fat bird is a healthy bird.

Every day from Friday, April 19th to Friday, April 26th, you will get the chance to vote for your favorite bulbous bird. Following Fat Bird Week, join NRF and SOS Save Our Songbirds for a free webinar: “Four Ways to keep Wisconsin’s Birds Fat and Healthy” where the winner of Wisconsin Fat Bird Week will be officially announced!


Only one chonk will reign supreme. Only the floofiest of the floofs will floof their way to victory. We love all of Wisconsin’s birds, but only one will hoist itself to the top of the bracket. Who will win the 1st annual Wisconsin Fat Bird Week? Only you can decide…

How does voting work?

Our 8 chubby contestants will compete in a single elimination, bracket-style tournament. The first round of voting opens at 9am CST on Friday, April 19th and voting will remain open for 48 hours. The second round of voting will open at 9am CST on Sunday, April 21st and remain open for 24 hours. The following rounds will all open at 9am CST and last 24 hours until the final round on Friday, April 26th. The winner will be crowned at the webinar on Tuesday, April 30th!