The rules are simple
Form a team of two or more people and identify as many bird species as you can in a single calendar day (24 hours). Once everyone on your team has identified a species, it can be counted.
A Big Birding Day
How many birds can you spot in 24 hours? In this article from Forest & Bird Magazine, Petrina Duncan and Mark Ayre share how they set out to beat the previous record of 58 species seen in Otago in one day.