I took a look at some eBird data going back to 2010. Using the “Top 100” feature i pulled up the data for each county from 2010 to 2012.
At the top of each of these records is the number of species seen in each county. While i’m not a fan of the county list – it’s all that eBird has. A county is an imaginary boundary that birds have no use for. The ecoregion concept is much closer to what the birds perceive in the environment — particular habitat. But even this concept has it’s limitations because of micro-habitats.
Anyway, this first post will show heat maps for the three years. (pretty bad heat maps, but the best i could do with MS Paint)
My hypothesis? More people are using eBird.