Mayflies in a sentence

Seeing lots of mayflies now tells us that the health of the lake was in a very good place two years ago when the eggs were laid.

The springs along its length keep the water cold enough for particular species to thrive in, like red-sided dace, mayflies, and brook trout.

Mayflies here also hatch in wintry weather so do not despair.

The mayflies were so bad, they were even caught on weather radar.

But the more beneficial flying insects of summer — native bees, moths, butterflies, ladybugs, lovebugs, mayflies and fireflies — appear to be less abundant.

Testing by the Pest Management Regulatory Agency found the buildup of the chemicals in groundwater was approaching levels dangerous to aquatic invertebrates like midges and mayflies, which are important food sources for fish and birds.

Agriculture and life around the lake In 1999, Doppler radar weather sensors detected millions of mayflies heading for Presque Isle in blue and green splotches on the radar in clouds measuring ten miles (16 km) long.

Each is an inch and a half long; the three main species of mayflies are Ephemera simulans, Hexagenia rigida and Hexagenia limbata.

The bobbing behavior occurs among some other aquatic insects as well, for example mayflies and dragonflies ; it is sometimes called " dapping ".

The controls were effective, but it took several decades to take effect; by 1999, there were signs that large numbers of mayflies were spotted on the lake after a forty-year absence signalling a return to health.

The flowering attracts vast amounts of mayflies which is a well known spectacle. citation Pollution main In early 2000, there was a sequence of serious pollution incidents originating from accidental industrial discharges in Romania.

These insects were a sign of Lake Erie's move back to health, since the mayflies require clean water to thrive.

What they do share with mayflies is the nature of how the wings are articulated and held in rest (see insect flight for a detailed discussion).