Friday, May 10, 4:00 pm through Saturday, May 11, 4:00 pm. Big Bay Birdathon. Participate in Bird City Green Bay's 8th Annual Birdathon! A birdathon is a 24-hour competition where teams of 2-4 people compete against each other to try and find as many wild species of bird as possible. Birds can be found anywhere in the state during the time frame. Teams will then get together on Saturday evening to submit their lists, claim prizes, and share stories. Registration is $20/person. All proceeds stay local to help with conservation projects in the community! For rules, registration, or more information, please contact Adam Sinkula at adam0227@msn.com or 920-255-3818. Details here.