The Michigan DNR in it's attempt to get more involved on the population explosion of cormorants in Michigan has set up a "Cormorant Activity Report" Web Page.  Basically every time you see cormorants, go to this web page and fill in the information and submit the page.

There is supposedly a link to this page from the Michigan DNR Website. I spent 15 minutes looking for it and couldn't find it so use the link above, it'll be alot easier for you.


We only see what the effects are by not having a good cormorant control plan in place when it comes to a maintaining a healthy fishery but what is the economic impact and costs that cormorants have on the Great Lakes?  Read this and find out.


I received this e-mail & pictures 6-22-09 via e-mail to show the cormorant activity in the Beaver Island Archipelago.

Attached please find some photos of ground nests on Trout Island and also
> numerous Cormorants in tree nests on Whiskey Island.  I received
> permission from the owner of Trout Island who reported to me hundreds of baby
> cormorants on his island a couple years ago and since we have often found
> large numbers of cormorants, like the 1000 we saw today near Trout Island.
> We investigated with Tony Aderman of USDA Wildlife Services and found close
> to 200 ground nests of cormorants on Trout Island and also well over 200 tree
> nests of cormorants on nearby Whiskey Island, an island that has been
> reported with a 0 nest count for many years.  These two findings
> contradict the information previously provided which do not include these two islands
> as nesting sites for cormorants in the Beaver Island Archipelago.

>I also included a photo of  20 pelicans that we found near High Island

click on picture for a larger view

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Cormorant ground nests on Trout Island

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Defoliated Tress on Whiskey Island

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Whiskey Island Ground Nests

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Pelicans Near High Island

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Whiskey Island Nests

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More Whiskey Island Ground Nests

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Whiskey Island Tree Nests

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Whiskey Island Tree Nests & Birds

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More Whiskey Island Tree Nests

Video of Double Crested Cormorants 

Cormorant vs. Pike

Another whole fish......gone (from the Florida Everglades)


The pictures above were taken on Port Austin, May 18, 2007.  Cormorants were diving and eaten the newly hatched shiners in the picture in the lower right corner.  All in all I counted around 50 cormorants.  According to the Harbor Master they have been there for 2 weeks.

This Spring, 2007, stomach inspections were done on cormorants and this bird had a 12 inch walleye, 7 bluegills, 5 perch and some other parts of fish that were more digested.....  THIS IS ONLY ONE BIRD!!!!!  


The Double Crested Cormorant population in Michigan has risen dramatically over the past few years to the point where there are concerns of an "over-population" of cormorants.

Past studies have shown that the cormorants preferred diet is small fish that thrive in the Great Lakes.  Over 75 fish species that make up the cormorants diet have been identified along with crustaceans, insects and reptiles.

The Flint River Valley Steelheaders (FRVS) has teamed up with United States Department of Agriculture-Wildlife Services (USDA-WS) by setting up a separate fund and collecting donations that will go directly to the USDA-WS Cormorant Control Research Program. 

Please send checks or money orders to:

Flint River Valley Steelheaders
Cormorant Control Research
PO Box 320303
Flint, MI  48532



News Articles & Writings

Detroit Free Press Article on Cormorants  (April 22, 2007)

Click here for the letter from the Flint Steelheaders on Cormorants

Read The Michigan Department of Natural Resources Report on Cormorants

A recent Ludington Daily News article on cormorants nesting off Ludington

DATE: 8-28-06
PUBLICATION: Kingston Whig-Standard (Ontario)
SOURCE: Osprey News Network
From the original six nesting pairs in 1990, the cormorant colony on Toronto's Leslie Spit has grown to 6,125 pairs; double that many breeding adults with chicks and non breeding birds, to 25,000 cormorants.  Without measures to control the cormorant population, other nesting birds will be displaced and, the Toronto Region Conservation Authority fears, the trees, vegetation and the spit itself may be consumed;  Queen's University adjunct biology professor John Casselman.....

From a few hundred nests in the mid 1070's, cormorant numbers have grown to more than 450,000 birds across the Great lakes Basin.