eBird species trend maps!

[Curt Brown --- Boulder, CO]

Cornell eBird is just releasing species maps showing trends in abundance from 2007 to 2021.  Wonderful consolidation of zillions of observations. 

I pulled up the map for Blue-gray Gnatcatcher.

https://science.ebird.org/en/status-and-trends/species/buggna/trends-map?utm_source=Cornell%20Lab%20eNews&utm_campaign=612a9e57e2-Cornell-Lab-eNews-November-2022&utm_medium=email&utm_term=0_47588b5758-612a9e57e2-306045397

This map tracks my experience of a significant decline in abundance along the Front Range.  It would appear that we are on the western edge of a broad  decline in abundance in the eastern US, whereas almost the entire West is showing increases.  

If nothing else, these  maps will fuel a lot of discussion and arm-chair theorizing.