Mayflies usually have three tails. Also, you can see their gills on their abdomen—they look like little bunches of hairs. Most mayfly larvae need really clean water to survive, almost any pollution at all will harm them.
Mayfly larvae
Mayflies usually have three tails. Also, you can see their gills on their abdomen—they look like little bunches of hairs. Most mayfly larvae need really clean water to survive, almost any pollution at all will harm them.