What Does a Mayfly Insect Look Like? If you’ve ever seen a reedy-looking bug with two long, antenna-looking protrusions from its abdomen, you might have seen a mayfly. Mayflies have thin bodies ...

After one or two years living in the gravel of the river bed, the mayfly larvae, or nymphs, swim to the surface, usually in mid-May, and change into winged insects. On the river bank they mate ...

Macadam said the database highlights other mayfly species “that are definitely reacting to climate change.” For instance, the larva of the blue-winged olive mayfly has been found overwintering ...

It’s not exactly pretty, but a mayfly hatch might be one of the Great ... Mayflies spend most of their lives underwater as larvae called naiads, emerging to become winged adults when the water ...

Macroinvertebrates, such as dragonfly and mayfly larvae, are key indicators of stream health. Some species are highly sensitive to pollution, while others can thrive even in degraded conditions.