Jun 9, 2020
Mayflies are hatching on the Upper Mississippi River!
This giant mayfly is part of the species Hexagenia limbata and is one of two species you can help report sightings of to the USA National Phenology Network.
Learn more about Mayfly Watch here: https://fws.usanpn.org/Campaigns/MayflyWatch Photo by Jamie Bertram/USFWS.
via: Upper Mississippi River National Wildlife & Fish Refuge - Wisconsin