Walleye and sauger are close relatives that share the same waters across much of Minnesota, and telling them apart on the ice can trip up even experienced anglers. They look similar, they eat similar baits, and they often show up in the same holes. But there are meaningful differences in how they behave, where they hold, and how to target each one effectively. Here’s a breakdown of both species and how to catch them through the ice.

How to Tell Them Apart

The easiest way to distinguish a walleye from a sauger is the tail. A walleye’s lower tail lobe has a white tip — a bright, distinct patch that sauger lack. Sauger, on the other hand, have distinct dark spots or blotches on their dorsal fin that walleye don’t have. Body coloration also differs: walleye tend to have a more golden or olive tone, while sauger are darker with more pronounced mottling and saddle markings along the back.

Size is another general indicator. Walleye grow significantly larger — fish in the 3- to 8-pound range are common, with trophies exceeding 10 pounds. Sauger rarely top 3 pounds in Minnesota, with most fish running 1 to 2 pounds. Knowing which species you’re catching matters because regulations often differ between the two, and some waters have separate limits.

Where Each Species Holds

Both species are bottom-oriented predators that feed during low-light periods, but they tend to use different parts of the lake. Walleye favor hard-bottom structure — rock reefs, gravel points, and the tops of sunken islands. They move shallower during feeding windows and retreat to deeper water during the day.

Sauger prefer softer substrate. Mud flats, silty basins, and the edges of river channels are prime sauger habitat. On river-connected systems like the Mississippi, sauger often concentrate in deeper pools and eddies where current is present. They tend to stay deeper than walleye throughout the day and are less likely to make dramatic shallow-to-deep movements. A lake contour map helps identify these different habitat types before heading out.

Presentation Differences

Walleye respond well to both aggressive and subtle presentations depending on their mood. Jigging spoons, jigging Rapalas, and glide baits fished with sharp snaps and long pauses are productive during active feeding windows. When walleye are neutral, slowing down to a dead stick with a live minnow under a bobber often picks up fish that won’t commit to a moving bait.

Sauger tend to prefer smaller, slower presentations. They’re less likely to chase an aggressive glide bait and more likely to pick up a small jig tipped with a minnow head sitting near the bottom. Dragging or subtly bouncing a jig along the bottom imitates the invertebrates and small baitfish sauger feed on. Downsizing from walleye-sized lures to something in the 1/8 to 1/4 ounce range often makes the difference when targeting sauger specifically. For a complete rundown of jigs, line, and rods, see our essential gear guide.

Where to Find Both

Lake of the Woods is one of the best waters in the state for catching both species in the same outing. The reefs hold walleye while the surrounding mud flats produce sauger, and it’s common to pull both from the same hole. Mille Lacs, the Rainy River system, and Lake Zumbro near Rochester also hold both species. Our Minnesota-wide guide covers additional destinations.

Understanding the differences between walleye and sauger makes every trip more productive. Recognizing which species is biting and adjusting the approach accordingly is what separates a good ice angler from a great one.