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When will the mayflies arrive?

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When will the mayflies arrive?


Temperature, wind and other environmental factors control the timing and number of mayflies that reach the shores of Lake Erie and Lake St. Clair.

In early summer along the western shores of Lake Erie and Lake St. Clair many people wonder, when will the mayflies (also known as fish flies) arrive and how many will there be this year?

First, a few key facts about mayflies. Mayflies are aquatic insects that live most of their lives in the water. Mayflies overwinter in sediments at the bottom of lakes and streams. Pollution and lack of oxygen in bottom sediments killed off Lake Erie’s mayflies in the early 1950s, and they remained rare for forty years. Mayfly populations began to rebound in the early 1990s and reached their density management goal 1997, which means there are enough to support other species.

Mayflies emergence in great numbers is part of their defense mechanism so that not all of them will be eaten and some can reproduce. Photo: Todd Marsee, Michigan Sea Grant.

Mayflies are an important food for birds and fish such as yellow perch. The presence of mayflies is considered an indicator of good water quality. Mayflies emerge from the water so that they can mate and lay eggs on the water surface. The eggs will later fall into the bottom sediments. Find out more online about the mayfly lifecycle and how you can reduce the number appearing in your backyard.

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What controls the timing of mayfly emergence?

The timing of mayfly emergence from sediments is based on the water temperature. Mayflies emerge after the water temperature at depth reaches 20 degrees Celsius (68 degrees Fahrenheit). In the western Lake Erie basin and Lake St. Clair, water is shallow enough that the water temperature at the surface is only a few degrees different from the temperature at depth.

How do I know what the water temperature is in Lake Erie or Lake St. Clair?

You can monitor the surface water temperature via buoys. A few days after buoys indicate a temperature of 20 degrees Celsius, the sediments will also warm to that temperature and mayflies will start to emerge. The National Oceanic and Atmospheric Administration has an experimental forecast product for bottom water depths that is frequently updated. You can also view current temperatures on the Seagull platform, part of the Great Lakes Observing System. This way you can tell in real-time when mayflies will begin to emerge.

If mayflies only live outside of water for two days, why does the mayfly “season” continue for several months (typically June through August)?

Scientists do not understand why mayflies persist so long. Mayflies emerge in different cohorts. One cohort has gone through several growth stages and is almost ready to emerge in late summer or fall but is prevented by the declining temperatures. These are the first cohorts to emerge the following summer. Individuals in the second cohort are smaller in the fall and are not ready to emerge until later in the following summer. There are also two similar but separate species of mayflies in Lake Erie and they may develop at slightly different rates.

Can you predict how many mayflies will emerge this year?

It is hard to predict how many mayflies will emerge because there are a number of environmental factors that control the number of mayflies. These factors include the number of mayflies that survive the winter as well as the oxygen levels at depth in Lake Erie. A harsh winter may mean fewer mayflies survive. Low oxygen conditions at depth can also suffocate the mayfly larvae in the sediments.

How many mayflies will reach my backyard?

Not all mayflies that emerge will reach land. Mayflies may land on islands instead. Wind speed and direction impacts whether mayflies from the Canadian side of Lake Erie end up on land in the United States or vice versa. Mayfly swarms are expected within a few days of water temperatures reaching 20 degrees Celsius and may continue up to 10 days (Corkum et al., 2006). In many cases, swarms are large enough to appear on weather radar at this time.

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When you see mayflies, remember they are a sign of healthy local water bodies and that the mayflies are providing food for birds and fish you like to watch or catch!

Michigan Sea Grant helps to foster economic growth and protect Michigan’s coastal, Great Lakes resources through education, research and outreach. A collaborative effort of the University of Michigan and Michigan State University and its MSU Extension, Michigan Sea Grant is part of the NOAA-National Sea Grant network of 34 university-based programs.

Citation: Corkum, L.D., Ciborowski, J. J. H., and Dolan, D. M. 2006. Timing of Hexagenia (Ephemeridae: Ephemeroptera) mayfly swarms: Canadian Journal of Zoology v. 84 n. 11, pg. 1616-1622.

This article was prepared by Michigan Sea Grant under award NA22OAR4170084 from the National Oceanic and Atmospheric Administration, U.S. Department of Commerce through the Regents of the University of Michigan. The statement, findings, conclusions, and recommendations are those of the author(s) and do not necessarily reflect the views of the National Oceanic and Atmospheric Administration, the Department of Commerce, or the Regents of the University of Michigan.

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Residents in Taylor, Michigan, fight against possible rezoning

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Residents in Taylor, Michigan, fight against possible rezoning


A group of residents on Holland Road in Taylor, Michigan, say they are now doing everything they can to keep their neighborhood the way it is after some of them received a letter saying the city is considering rezoning their neighborhood. 

“People across the street from me could have warehouse front property instead of woods and nice residential homes,” said Matthew Streicher.

Streicher, whose family has owned property on Holland Road for more than 100 years, says that has been his concern after he received a letter from the city about a proposed rezoning from residential to light industrial directly behind his home near Wick and Holland roads. 

“So that’s when I also decided to start knocking on doors around here and saying this is what is going on, we need to speak out and have a voice as to what happens in our backyards, literally,” said Streicher.

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Streicher told CBS News Detroit that three of his neighbors received that letter, informing residents that there’s a possibility of a new cold storage warehouse development if this land is rezoned.

“Nothing that belongs in a neighborhood,” said Tim Adkins.

“Heartbreaking, heartbreaking, you know,” said Denise Haggadone.

Many who live on Holland Road say this possibility is even more disturbing because of how long everyone has lived on this quaint road. And these same homeowners say that an industrial facility would only bring in more traffic and take away natural green space, most likely hurting their property value as well.

“It’s nice to see the wildlife, you know, there’s so few places left,” said Adkins.

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On Tuesday, CBS News Detroit spoke off-camera with City Council Chairman Charley Johnson, who also lives on Holland Road. Johnson says he understands all of his neighbors’ concerns and agrees with them. 

He says the company proposing this rezoning has every right to do so, and that the planning commission will vote on it Wednesday evening. 

“It’s sad, I raised my kid here, and he’s planning on having this home after I pass or retire or what have you,” Haggadone said,  

The residents hope to see a big turnout at Wednesday’s planning commission meeting at 7 p.m. on Wednesday, June 3, at Taylor City Hall. 

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Sterling Heights to consider opposing Michigan House tax policy bills

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Sterling Heights to consider opposing Michigan House tax policy bills


The Sterling Heights City Council is set to consider a resolution Tuesday evening opposing tax policy bills in Lansing that one councilmember contends put every municipality “at risk.”

The Michigan House voted in May to pass several bills that would slash property taxes across the state, but skipped a vote on a bill needed to replace some of the more than $5 billion in lost tax revenue.

At its Tuesday evening meeting, Sterling Heights City Council is slated to consider the adoption of a resolution opposing Michigan House Bills 5872 through 5879 due to “their potential negative impact on local government revenue, financial planning, and administrative operations,” a city document said. Sterling Heights City Manager Mark Vanderpool said the city would lose about $5 million in annual revenue from the bills. He said there’s no “guaranteed replacement” for the lost revenue, and the city would need to cut services, he said.

“So we’re deeply concerned about that,” he said.

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The House’s sweeping tax cuts can’t be implemented without the passage of a separate bill levying a loosely defined 6% sales tax on services that has yet to be revealed. Republicans who control the House did not hold a vote on the sales tax hike bill, which remains in committee.

All combined, the four property tax cuts passed by the House are estimated to result in a tax revenue loss that could progress from $5.5 billion to $7.5 billion a year, according to a series of nonpartisan House Fiscal Agency analyses. 

Vanderpool, the Sterling Heights city manager, said he wants the state Legislature to work “hand in hand” with cities, townships and villages to come up with a solution for “guaranteed revenue replacement.”

“We are more than willing ― I think our reputation precedes us ― to work with our state legislators hand in hand to come up with viable solutions that … may reform property taxes without harming communities across the state,” he said.

Sterling Heights Councilwoman Barbara Ziarko said the legislation reduces the city’s revenue without a guarantee of what it will be replaced with. She said that in the future, the legislation could prevent the city from maintaining positions that it has promised residents it would maintain, including public safety roles.

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“When they put the burden on our local government, they’re actually putting it on the residents of whatever community it is,” she said.

State Rep. Steve Frisbie, a Calhoun County Republican, previously said that Michigan residents need to see tax relief immediately. He noted a ballot proposal collecting signatures last year would have eliminated all property taxes in the state. That citizens’ initiative, known as AxMiTax, fizzled out and won’t be on the ballot this fall.

“They realized that our property taxes are too high and they demand that we take action now,” Frisbie said.

More on the bills

The cuts passed by the House in May would eliminate the 6-mill State Education Tax and eliminate the 0.75% real estate transfer tax assessed on the sale price of real estate.

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House Republicans also signed off on eliminating the personal property tax. That bill, largely intended to benefit utility companies, is tied to separate legislation that requires utilities such as Consumers Energy and DTE Energy to pass on personal property tax savings by cutting electric and gas rates for their residential customers. It also requires utilities to freeze rates for two years.

Jennifer Varney, Sterling Heights’ finance and budget director, said the elimination of the personal property tax would result in a $4.3 million annual revenue loss for the city. She said the personal property tax refers to the taxes that businesses pay on their assets, such as their machines and vehicles.

Another tax on the chopping block is the so-called “pop-up tax,” an increase in a property tax bill that occurs when a house transfers from one owner to the next in Michigan, uncapping a constitutional limit on the property tax increase on a home’s taxable value.

Under the state Constitution, a property’s taxable value cannot increase by more than the rate of inflation or 5% each year. But when a property is sold, that cap lifts and is reset at a new, often higher taxable value, resulting in a “pop-up” in property taxes.

Varney said the “pop-up” is the only way cities “recapture” the true value of a home. Michigan also has the Headlee Amendment, a state law that requires local governments to roll back millage rates if taxable property values rise faster than the rate of inflation.

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“If you take away the pop-up … and you keep the rollback of the millage, you’re basically limiting any kind of growth in taxable base for municipalities,” she said.

Staff Writer Beth LeBlanc contributed.

asnabes@detroitnews.com



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Search for Lynette Hooker reopened after Michigan woman disappeared in Bahamas

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Search for Lynette Hooker reopened after Michigan woman disappeared in Bahamas


The search for a missing Michigan in the Bahamas has been reopened after authorities say her husband allegedly gave police false information.

Lynette Hooker and her husband Brian were boating in the Bahamas in early April when, according to her husband, she fell off the boat and was swept to sea. Brian told police he had to paddle to shore after Lynette fell into the water because she had the key.

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Brian was taken into custody in the Bahamas after Lynette’s disappearance, but was later released and returned back to Michigan.

Recently, it was revealed that new location data from Brian’s cell phone contradicts the story he gave to authorities, and suggests he may have sent search crews to the wrong area. This new information has led to the U.S. Coast Guard reopening its search for Lynette.

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The Source: Previous reporting and information from FOX News were used in this story. 

Crime and Public SafetyMichiganWorld



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