Insect invasion: See millions of mayflies swarming in northern Ont.

It's that time of year again. Mayflies numbering in the millions are swarming parts of northern Ontario as they rise from the lake and cling to any surface they can find.

Fish flies descend on Windsor, Ont., and other lakeside

How to Survive a Massive Mayfly Swarm

Canada News Today

Mayflies emerging from Mississippi River in swarms

When Do Mayflies Hatch: Insight into Their Life Cycle - What's That Bug?

Fish flies descend on Windsor, Ont., and other lakeside communities

Insect invasion: See millions of mayflies swarming in northern Ont

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Prairie Research Institute News

Mayflies are back in Northeast Ohio in numbers large enough to show up on radar!