Wildlife at Escanaba Lake, Wisconsin

August 12, 2023 • 1:50 pm

by Greg Mayer

I’m going to try to post some of my own wildlife photos while Jerry is not in a position to post readers’ wildlife photos. (We can look forward to Jerry’s posts of Galapagos wildlife photos, which we eagerly await!) To start, here are some pictures from a field trip¬† I took to Vilas County, Wisconsin, last summer with colleagues from the University of Wisconsin Zoological Museum in Madison. These pictures are from our visit to Escanaba Lake, where the Wisconsin Department of Natural Resources has a small field office that conducts careful surveys of the fish in the Lake.

Escanaba Lake, Wisconsin, 23 July 2022.

We went out with DNR fisheries biologist Greg Sass, who showed us some of the research being carried out by the DNR. Greg got his PhD at Madison, where he is affiliated with the Center for Limnology.

Escanaba Lake, Wisconsin, 23 July 2022.

Part of the DNR’s research involves fyke net surveys:

Escanaba Lake, Wisconsin, 23 July 2022.

Here are some of the fish found in the Lake. My ichthyological expertise is minimal, so the IDs will be to family only; feel free to volunteer species IDs in the comments. [Added: see species IDs by Mark R in comment #2.] Centrarchidae:

Escanaba Lake, Wisconsin, 23 July 2022.

Ictaluridae:

Escanaba Lake, Wisconsin, 23 July 2022.

Esocidae:

Escanaba Lake, Wisconsin, 23 July 2022.

A large Bullfrog (Rana catesbeiana) tadpole also turned up:

Escanaba Lake, Wisconsin, 23 July 2022.

But the highlight for me was that Northern Water Snakes (Nerodia sipedon) were very common at the boat launch. There were little ones:

Escanaba Lake, Wisconsin, 23 July 2022.

And big ones:

Escanaba Lake, Wisconsin, 23 July 2022.

Measuring the big one– about 44 inches, total length:

Escanaba Lake, Wisconsin, 23 July 2022.

Sometimes, the big and little hung out together:

Escanaba Lake, Wisconsin, 23 July 2022.

The biggest ones were under and around an overturned boat:

Escanaba Lake, Wisconsin, 23 July 2022.

The snakes were so common, I told Greg it would be a great place for someone to do a thesis on their population biology and behavior. Some more water snake photos:

Escanaba Lake, Wisconsin, 23 July 2022.
Escanaba Lake, Wisconsin, 23 July 2022.
Escanaba Lake, Wisconsin, 23 July 2022.

This being Wisconsin and all, we had dinner the night before at a supper club, accompanied, for most of us, by brandy old fashioneds:

Brandy old fashioneds (mostly) at Marty’s Place North, now sadly closed.

Root River turtles

July 1, 2018 • 3:00 pm

by Greg Mayer

A couple of Sundays ago, June 17, 2018, my wife and I took a paddle along the Root River, in Racine, WI. Starting out at the Root River Environmental Center (REC), we went upstream, around the island in Island Park, and back down to the REC. Along the way we saw quite a few turtles– 15-20, although at least a few were the same turtles seen going both up and back.

Here, a shelled reptile and a glorified reptile share a tree trunk in mid stream.

Female mallard and map turtle in Root River, Racine, WI, 17 June 2018.

On the next picture, it’s a bit of “spot the turtle”– the smaller one is inconspicuous. Both these two and the one in the previous picture appear to be map turtles (Graptemys). These turtles are typically more riverine than lacustrine, and thus might be expected in the river, except that the Root River is outside the range of map turtles, which occur in Illinois to the south and along the larger rivers of western Wisconsin. The map turtles of southeast Wisconsin are almost certainly introduced. What species they are is not clear to me. The species-level taxonomy of map turtles is not completely worked out, especially down South, where each river that drains into the Gulf of Mexico seems to have a more or less distinctive population of map turtles.

Two map turtles in Root River, Racine, WI, 17 June 2018.

Although it might be natural to think that one of the midwestern species was introduced into southeast Wisconsin, southern turtles can be found in the pet trade, and there may be more than one species present in the Root River. (In Kenosha, just south of Racine, I’ve seen at least two map turtle species.) It’s not known if they are breeding, and if so, whether different forms are crossing. I did find a hatchling in Kenosha, but I can’t rule out– in fact I lean toward– the possibility that it was released, rather than bred, there.

This next turtle is definitely a map turtle. Note the hint of serration or knobs on the shell along the midline, and the white neck markings.

Map turtle in Root River, Racine, WI, 17 June 2018.

The next turtle is a snapping turtle (Chelydra serpentina), hauled out on the island in Island Park. It’s not a very good picture– that’s its tail you’re looking at– as the turtle slipped into the water as we maneuvered for a better shot, but snapping turtles so rarely bask on land that I though it worth showing. (They often float right at the surface, which is their usual way of ‘basking’.)

Snapping turtle on island in Island Park, Root River, Racine, WI, 17 June 2018.

The species we saw the most of were midland painted turtles (Chrysemys picta marginata), which, like snapping turtles, are more of a pond than river species. The Root River is shallow and slow-moving, though, so the conditions are fairly pond-like. You can tell it’s the midland subspecies because the seams between the costal (‘rib’) scutes don’t line up with the seams between the vertebral scutes

Painted turtle in Root River, Racine, WI, 17 June 2018.

We saw a bunch, but the gal above let us get the closest, so she gets a closeup. (You can tell it’s a she by the large size and the short ‘fingernails’– males are smaller, and have longer front claws.)

Painted turtle in Root River, Racine, WI, 17 June 2018.

We did see two or three of southeast Wisconsin’s classic native river turtle, the smooth softshell (Apalone mutica). They are baskers, but very skittish, and thus hard to approach. I was using a 55-200 zoom lens on this trip, and got a decent picture of one. Notice that the ‘log’ it is on is actually an old piling or dock piece– note the bolt, nut, and metal plate.

Smooth softshell turtle in Root River, Racine, WI, 17 June 2018.

Finally, towards the end of our two-hour paddle, we encountered what I believe to be the same two map turtles we saw at the start of the trip, who are in the first picture above– it is the same log. Sexual size dimorphism is stronger in map turtles than painted turtles, so this could be a female and a male.

Two map turtles on the Root River, Racine, WI, 17 June 2018.

The possible male dove first, but we got close enough to see the neck markings and hint of dorsal serration in the probable female. Of the two native map turtles in western Wisconsin, the plain old map turtle, Graptemys geographica, is less serrated than the false map turtle, Graptemys pseudogeographica, so this would be a geographica, except that the two Wisconsin species aren’t the only possibilities. (One of the two map turtle species I’ve seen in Kenosha is definitely a ‘white-eyed’ southern form.)

A probable plain old map turtle on the Root River, Racine, WI, 17 June 2018.

Given that it’s a small river hemmed in by human development on all sides, with a past history of industrial usage, four species of turtle, all reasonably abundant– all with multiple sightings during the trip, except for the snapper, which, as a non-basker, is often not seen– is actually a decent amount of biodiversity.