Mentor Marsh

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Mentor Marsh Interpretive nature preserve owned & managed by CMNH-Natural Areas Division; co-owned by ODNR-DNAP.

Hurrah! More superstar stopovers have arrived at the Marsh. It’s amazing to host so many animals over the seasons. Why a...
10/14/2026

Hurrah! More superstar stopovers have arrived at the Marsh. It’s amazing to host so many animals over the seasons. Why are we so excited about blackbirds? They invigorate our passion for protecting and restoring wetland habitats as Rusty Blackbirds are one of the most rapidly declining and elusive bird species in North America. “The Rusty Blackbird (Euphagus carolinus) is a widespread North American species that has shown chronic long-term and acute short-term population declines, based both on breeding season and wintering ground surveys” (Rusty Blackbird Project). Hypotheses on their steep decline include losses of wetland habitats in both their wintering and breeding grounds. We sure are glad to see them and happy to host them here to rest and recharge on their route to wintering locations.

“Rusty Blackbirds, or “Rusties,” get their name from their fall and early winter plumage, when their dark feathers are edged with a rusty brown color” (Rusty Blackbird Project). Love Nan’s captures of them yesterday around Shipman Pond! Aren’t they beautiful?

Read more about the natural history as well as the plight of Rusties at links in the comments.



Mentor Marsh State Nature Preserve, 10/13/26
Photo credits: Nan Patrick

What a treasure this Marsh is with all of its wildness! Nan caught one of the marsh eagles moving sticks around in the n...
10/13/2026

What a treasure this Marsh is with all of its wildness! Nan caught one of the marsh eagles moving sticks around in the nest yesterday and as one flew off, it looked like both were in the nest together! Working on the nest in the fall is one of the pair bonding activities!

From The Raptor Resource Project: “Nest building plays a key role in bonding. Pairs bring in sticks, large branches, and soft materials to rebuild and replenish their nests.

As courtship deepens, they ramp up their nestwork, burying last year’s nestorations under piles of new sticks and heaps of corn husks, corn stalks, and fluffy grass. Male eagles bring food gifts to their mates, eagle couples perch and vocalize together, and eagles prepare their nest bowls for eggs by digging, scraping, and molding multiple layers of soft stuff to the nest’s floor. They move from working and perching together to pecking, footing, body brushing, and displaying, which further reinforces their bond. Occasional copulation usually begins in late November or early December.”

Go eagles! This marsh sure is marvelous!

Mentor Marsh State Nature Preserve, 10/12/26
Photo credits: Nan Patrick

We’re all hanging on to these fleeting warm days, including this amazing late blooming marsh mallow, Hibiscus moscheutos...
10/12/2026

We’re all hanging on to these fleeting warm days, including this amazing late blooming marsh mallow, Hibiscus moscheutos! Hope you enjoy the day and Happy Indigenous Peoples Day!

Mentor Marsh State Nature Preserve, early October 2026
Photo credit: Nan Patrick

Good morning, sunshine! It’s a beautiful morning in the Marsh today. We’re enjoying the fall colors and the crisp air fi...
10/10/2026

Good morning, sunshine! It’s a beautiful morning in the Marsh today. We’re enjoying the fall colors and the crisp air filled with insect and bird songs. October in the Marsh sure is spectacular!

We’re out here for our monthly Second Saturday Science Open house where we open the gates and allow entry into an area that has limited public access. Taken advantage of this and get on out here! And mark your calendars for every second Saturday going forward. It’s spectacular out here!

See link in comments for more information on this Mentor Marsh opportunity.

Mentor Marsh State Nature Preserve, 10/10/26
Photo credit: Becky Donaldson

This pretty little sparrow has been a superstar over the last week as it’s stopped in to rest and recharge in the Marsh....
10/09/2026

This pretty little sparrow has been a superstar over the last week as it’s stopped in to rest and recharge in the Marsh. It’s a LeConte’s Sparrow, Ammospiza leconteii, and they’re on their way from breeding grounds in wetlands in the upper Great Plains to overwinter in the south central U.S. and we get to host them!

Folks flocked here from all over Ohio, plus we talked with visitors from PA and WV who all came to the Marsh to try to see the hard to find LeConte’s Sparrows! “The LeConte's Sparrow is famously elusive. It stays hidden in dense grass, often running along the ground rather than flying. They're so hard to find and track that, although the species was officially described in 1790, it took scientists nearly 100 years longer to find and describe the first nest” (All About Birds).

LeConte’s Sparrows are smaller than Song Sparrows; about the size of a Marsh Wren. They are “distinctly orange-buff all over, particularly on the head and upper breast. It has black streaks on the back and wings and a grayish-purple spot on the back of the neck. The belly is white. The bill is gray” (All About Birds). Ohio Naturalist Jim McCormac’s description is spot on: “The Le Conte's Sparrow is quite dashing, really. I think even a person with only marginal interest in avifauna would find one nice. From the creamy crown stripe to the intricate streaking of the back, they exhibit the best of the subtly beautiful sparrow adorments. Having to work hard to see one - at least around here - adds to the thrill of seeing one.”

To find one, folks birded along the Wake Robin boardwalk and had the chance to observe many other birds as well as they watched and waited for a LeConte’s to come into view. They’re notorious to find as this tiny sparrow “walks or hops on the ground, often among dense grasses. Does not flush readily, and prefers to escape from disturbances on foot. When they do fly, their flights are short, with quick, weak wingbeats before disappearing back into the vegetation” (All About Birds).

We’ve had great weather for birding in the marsh and it looks like we’ve got several more days of this gorgeous fall weather! Tomorrow morning’s the second Saturday of the month so that means we’ll be out in the wild western end of the Marsh for our Second Saturday Science open house from 8 am to noon. Access to this area is at the gate at Woodridge and Forest. It’s open house style, so come when you can! A reminder that access into the state nature preserve is for foot traffic only and pets are prohibited.

This marsh sure is marvelous! Hope you take advantage of this weather and the special access on Saturday morning and come visit our wild, western end of the marsh!

Read more natural history information on LeConte’s Sparrows and about our Second Saturday Science event at links in the comments.

Mentor Marsh State Nature Preserve, early October 2026
Photo credit: Kari Warner

Enjoy this thrill in your Thursday morning Facebook feed! Our Marsh stewardship team not only watched a female painted t...
10/08/2026

Enjoy this thrill in your Thursday morning Facebook feed! Our Marsh stewardship team not only watched a female painted turtle laying eggs near our headquarters at the Mentor Marsh Nature Center in late June, but they got to witness the eggs hatching yesterday, too! Amazing!

“In the early summer females lay 4 to 15 oval, soft-shelled eggs, in a flask-shaped hole. Females choose soft, sandy soil with good exposure to the sun in which to dig the hole. Once the eggs are laid they cover the hole and leave. The young hatch and dig out of the nest on their own, they are independent immediately” (ADW).

Go turtles! Read more natural history information on painted turtles at the link in comments.

Mentor Marsh State Nature Preserve, 6/25/26 and 10/7/26
Photo credits: Mia Yeager

Hurrah for fall colors! This gorgeously colored specimen is a Poison Sumac, Toxicodendron vernix. This small shrub/tree ...
10/07/2026

Hurrah for fall colors! This gorgeously colored specimen is a Poison Sumac, Toxicodendron vernix. This small shrub/tree is a wetland denizen! “The preference is full or partial sun, wet to moist conditions, and mucky, peaty, or sandy soil that contains decaying organic material. The soil pH should be more or less acidic. This shrub can tolerate standing water for several months each year. …Generally, Poison Sumac is found in higher quality wetlands where the native flora is still intact” (IL Wildflowers).

Despite its highly allergenic nature, there’s nothing to fear! It’s doubtful you will run into this shrub as it grows in wetlands and in high quality ones, too.

“Like the more common Toxicodendron radicans (Poison Ivy), all parts of this shrub exude a floral oil (uroshiol) that can irritate the skin of many individuals because its triggers an allergic reaction. While Poison Ivy is normally a climbing woody vine with trifoliate leaves, Poison Sumac is an erect shrub that has compound leaves with 7-13 leaflets. Poison Sumac prefers habitats that are more wet than those in which Poison Ivy occurs, and so these two species are rarely seen together. Poison Sumac is similar in appearance to a Sumac (Rhus sp.), but its leaflets have smooth margins rather than toothed, and its drupes are white and glabrous rather than red and hairy. Poison Sumac also superficially resembles a young Ash tree (Fraxinus sp.), but the latter has opposite compound leaves and its fruit is a winged samara, rather than a drupe” (IL Wildflowers).

Some Poison Sumac survived the salt intrusion in the marsh in the swamp forest on the southwest side of the marsh and is recolonizing the wetlands likely via birds eating the fruits and spreading them.

Hurrah for fall colors and hurrah for biodiversity! This marsh sure is marvelous!

Read more about poison sumac in the links in comments.

Mentor Marsh State Nature Preserve, 10/6/26
Photo credits: Becky Siekkinen Donaldson

Happy sunshiny day! Fall really is a brilliant season and it’s been so nice to see the sun AND these sunny wildflowers, ...
10/06/2026

Happy sunshiny day! Fall really is a brilliant season and it’s been so nice to see the sun AND these sunny wildflowers, too! Can’t get enough of late season goldenrods especially the elegance and beauty of blue-stemmed goldenrods! We exclaimed out loud at this large patch we found on our Sunday hike this past weekend. So gorgeous!

Blue-stemmed goldenrod is shade tolerant and grows in a wide variety of soils. Do you have a place for it in your native landscaping? Read more about it at the link in comments.

This marsh sure is marvelous!

Mentor Marsh State Nature Preserve, 10/4/26
Photo credits: Becky Siekkinen Donaldson

10/05/2026

Have you noticed the large midge emergence up by the lake? Jamie shared this video from above Shipman Pond on Saturday night. And we spotted many of those little buggers caught in spiderwebs on our Sunday hike at the Marsh yesterday (see pic in comments). Different hatches in the spring and fall are dependent on the lake temperature.

These little flies resemble mosquitoes but are non-biting. As larvae, they pass nutrients on up through the food web by consuming decomposing organic material, algae, bacteria and microorganisms in sediments and then in turn being consumed by larger macroinvertebrates, amphibians and fish. As adults, midges do not eat, but are consumed by dragonflies, spiders, amphibians, bats and birds like warblers, swallows, and swifts.

Despite the annoyance of these large swarms of midges, they really are a neat phenomenon and are an important part of our ecosystem!

Mentor Marsh State Nature Preserve, 10/3/26
Video credit: Jamie Koller

Good morning from Mentor Marsh! Every day is a great time to get outside, but these early fall days are off the charts!W...
10/03/2026

Good morning from Mentor Marsh! Every day is a great time to get outside, but these early fall days are off the charts!

We’ve got early reports of a Nelson’s Sparrow at the end our Wake Robin boardwalk, too, so there’s more of a reason to get out there! Treasures abound in our marsh! Our trails are open dawn to dusk, year round. The parking lot and access to the Wake Robin boardwalk is at 8934 Woodridge Lane in the Headlands.

You can always join our naturalist-led hikes as our group hikes discover so much while we’re out exploring! They’re offered every Sunday at 2 pm the rest of the month and the first Sunday of the month November-March. There’s always something neat to find! Check link in the comments for our CMNH and Mentor Marsh programming.

Nelson’s Sparrows are celebrities when they’re spotted by sharp-eyed birders at the Marsh. (Thanks, Josh, for the report!) These sparrows breed in marshes in the upper Great Plains in MN and the Dakotas up into the Canadian provinces, and we catch them in migration as they hopscotch wetlands with ample seeds (like ours!) to rest and recharge on their way to overwinter in coastal wetlands along the Atlantic seaboard and Gulf.

“A colorful standout in a family of mostly streaky brown birds, Nelson’s Sparrows have bold yellow-orange faces, gray cheeks, and a neat band of yellow across a finely streaked breast. These notably short-tailed sparrows are furtive creatures, spending most of their time on or near the ground in dense marsh vegetation” (All About Birds).

This marsh sure is marvelous!

Mentor Marsh State Nature Preserve, fall 2025
Photo credit: Mia Yeager

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Mentor Marsh Nature Center, 5185 Corduroy Road
Mentor, OH
44060

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