They're coming: Mayfly hatch expected along Mississippi River soon

Hastings is turning off the lights to "lessen the impact" of the mayfly hatch.
Author:
Publish date:

The city of Hastings is preparing for the first big mayfly hatch of the summer by turning off all the lights. 

Yes, that's right. The city starting Wednesday and continuing through the weekend will turn off lighting along streets and parking lots in the downtown area, on the bridge and along the riverfront to "help lessen the impact" of the insects, which can be attracted to bright lights during their short lives.

Mayflies can be found in almost all freshwater systems that have adequate oxygen levels (they're actually a sign that the body of water is healthy), and when its time to hatch the mayflies often do it all together, the Minnesota Department of Natural Resources website says

These large hatches are so big they have been spotted on weather radar.

Hatches happen a few times a year when mayflies emerge from the water, becoming adults only a few days later. Then they mate, the female drops her eggs back into the water, and then they die soon after, the DNR says. An adult mayfly rarely lives longer than a month.

Sometimes when they die, they all die in the same place. Their dead bodies can make roads slippery. And sometimes snowplows have to be called in to clear the dead bugs off the road. 

The city of Hastings, which is familiar with large mayfly hatches, says "Any mess on public streets and parking lot areas resulting from mayfly hatch activity will be cleaned up only during normal business hours."

Next Up

coronavirus, SARS-CoV-2

Minnesota confirms America's 1st case of Brazil P.1 COVID strain

The strain was found in a Twin Cities metro resident who recently traveled to Brazil.

classroom

Gov. Walz announces education plan aimed at eliminating disparities

The plan covers seven categories, including closing the racial education gap and improving opportunities in rural Minnesota

Tax forms

Charges: Otsego cleaning business underreported sales

An Otsego woman is accused of owing more than $20,500 in sales tax, penalties and interest.

Screen Shot 2020-04-17 at 2.58.26 PM

Walz gives vaccine providers 3-day, 7-day deadlines to use doses

Those that don't use their allocation will be given less in the future.

purse

Border officers seize more than $550K in counterfeit designer goods

The shipments of fake goods were seized on Jan. 22.

Landfill plastic bags

4 Twin Cities landfills seek to expand capacity

This comes as the area's waste-to-energy facilities are operating at capacity.

Marcus Carr

3 of 10 finalists for NCAA's top point guard award have MN ties

Not a bad way to represent the State of... Basketball?

Justice, court

Minnesota grants unconditional pardon to grandmother facing deportation

Gov. Tim Walz says it's the first full pardon granted by the state in 35 years.

covid-19, vaccine

Minnesota changes vaccine appointment process, here's what to know

Walz also announced plans for a mass vaccination event at Xcel Energy Center.

covid-19, coronavirus

Here is Minnesota's COVID-19 update for Monday, Jan. 25

The latest figures from MDH have been released.

covid-19, vaccine

Minnesota health leaders say state's vaccine progress better than figures suggest

Minnesota is lagging behind national vaccination rates, but MDH leaders say this is because it's holding 2nd doses in reserve.

Related

upper st. anthony falls lock and dam

Rare chance to see what the Mississippi River in Minneapolis used to look like

The Upper St. Anthony Falls Lock and Dam will be open to the public.

mississippi river 13

Photos: Rare drawdown of the Mississippi River in Minneapolis attracts hundreds

The river was about 12 feet lower than normal, exposing riverbeds and pieces of history.

Mississippi River at Point Douglas Park in Hastings

Mississippi River drowning victim near Hastings identified

The man died in a drowning accident Nov. 14.

Hundreds of motorcycles expected along Mississippi River Saturday

The annual Spring Flood Run is taking place between Winona and the Twin Cities in Minnesota and Wisconsin. KAGE Radio reports money raised from cyclists participating in the event goes to the Gillette Children's Hospital in the Twin Cities.

Trio's attempt to canoe the Mississippi in 14 days ends in Iowa

They were in pursuit of the world record in honor of their friend.

A black bear.

Sheriff's office sees 'significant' increase in bear complaints recently

Natural food sources have been slim, so bears are finding alternatives provided by humans.

Mississippi, Boundary Waters named on 'most endangered' list

The American Rivers report highlights risk facing 2 prominent areas of Minnesota.