What is Birds Per Hour?
"Birds per hour" is the average number of birds seen per hour spent birding within a specified date range and region. Similar to Abundance in that it gives the user a measure of the status of birds in a specific area, birds per hour goes one step further and incorporates time into the calculation providing a measure of correction for the effort expended while birding. For instance, if one spent 6 hours birding and recorded just 6 Black-capped Chickadees, the result would be 1 Black-capped Chickadee/hour. But if one spent just 1hr birding and recorded 6 Black-capped Chickadees, the result would be 6 Black-capped Chickadees/hr—indicating a higher abundance. This methodology is used for the Christmas Bird Count and allows for a useful comparison of the various methodologies available in eBird.