This page is a work in progress.

The Thumb – Wikipedia
https://en.wikipedia.org/wiki/The_Thumb

Michigan Natural Features Inventory
https://mnfi.anr.msu.edu/

Michigan Flora
https://www.michiganflora.net/

Michigan EGLE Wetlands
https://www.michigan.gov/egle/about/organization/Water-Resources/Wetlands

Michigan EGLE Inland Lakes and Streams
https://www.michigan.gov/egle/about/organization/Water-Resources/inland-lakes-and-streams

Michigan EGLE Great Lakes Submerged Lands
https://www.michigan.gov/egle/about/organization/Water-Resources/submerged-lands