Michigan USDA Plant Hardiness Zone Map
https://planthardiness.ars.usda.gov/PHZMWeb/InteractiveMap.aspx
Sighting Maps:
This link contains sighting maps for Hummingbirds, Monarchs, Robins etc. Just click on the desired box and a sighting map will appear for that category.
You can also report sightings for any of the particular categories. Just click the word sightings at the top of the pages. The Map is interactive.
https://maps.journeynorth.org/maps
Monroe County Master Gardener Association 
I LOVE THIS!!!!!-when I mentioned to you, I knew of the individual maps but had no idea about this site……you are the best at what you do for our group
thanks–i tried it out when I checked to see if anyone in this area had reported a robin sighting as I have seen some but lacked an exact date. Neat!!! gk
Thanks Gail, I thought this was a great site too. We watch for so many special things and creatures…It is a great map.