(c) NOAA Great Lakes Environmental Research Laboratory, some rights reserved (CC BY-NC) CC BY-NC · iNaturalist - Observations
- 2
- Peak
- mid May
- Years Recorded
- 2
- First
- 2020-05-15
- Most Recent
- 2023-12-01
Verified observations per week, all years combined. Weeks with no records are left blank.
