What is this? This is from eBird data collected from 1900-2012 for all months and weeks of the year as of 2/22/2013. All the data is rolled up by State and Province. The geographical area covered is all the Lower 48 States, all the Canadian Provinces, and Alaska. The % of Checklists is the same as eBird’s Frequency of Checklists. It represents the number of positive checklists out of all the checklists submitted. The first number, 2.62% means that for the first week of November (1st-7th) 2.62% of all the checklists submitted to eBird recorded one or more sightings of Yellow Rail. Why is it listed here? Because this number is the BEST. It is the top ratio for Yellow Rail in North America. It is the best week out of 48 “eBird” weeks (4 per month) and the best State or Province (out of all 63). These data represent the PEAK or MAXIMUM of a species for North America. Here are the other weeks in November.