Bird-a-thon, Mass Audubon's annual fundraiser where teams of birders spend 24 hours trying to spot the most species in Massachusetts, took place May 11-12, 2012.
We can't wait to see what happens next year at Bird-a-thon 2013 - our 30th Bird-a-thon - which will be held on May 17 & 18. Stay tuned!
Photo by Rene Laubach
