Last weekend marked the seventh edition of the "Superbowl of Birding", sponsored by Massachusetts Audubon’s Joppa Flats Education Center.
Teams have 12 hours to tally points by sighting different bird species. Points are accrued based on the rarity of a given species. The rarer the species, the more the points. The first team to identify a particular species earns three bonus points. This year's Superbowl of Birding drew 17 teams with 87 participants.
Here's a report on Superbowl VII: