Laona Heights Sugar River Colored Sands Sugar River Two Rivers Ferguson Hartley Memorial Trask Bridge Four Lakes Pecatonica River Pecatonica Wetlands Crooked River Grove Creek Seward Bluffs Klehm Forest Preserve Severson Dells Fuller Memorial Cedar Cliff Indian Hill Hinchliff Memorial Kilbuck Bluffs Trailside Kishwaukee Gorge South Kishwaukee Gorge North Rockford Rotary Kishwaukee River Oak Ridge Blackhawk Springs Deer Run Espenscheid Memorial McKiski County Line Kieselburg Roland Olson Stone Bridge Clayton Andrews Ledges Hononegah J. Norman Jensen Millrace Isle Macktown Atwood Homestead Forest Preserve Headquarters

Arachnids and Crustaceans

Arachnids and crustaceans are members of the largest category of creatures on the planet: arthropods. Arthropods have hard, external shells called “exoskeletons,” segmented bodies and jointed legs. (The word arthropod comes from the Greek words for “joint” and “foot.”) A wide variety of arthropods call Winnebago County home.


Spiders, harvestmen, mites, ticks and other arachnids are members of the class Arachnida. All adult arachnids have eight legs and two body sections: a cephalothorax and an abdomen.


Crustaceans make up a large group of arthropods that includes animals such as crabs, lobsters, crayfish and shrimp. They breathe with gills and have two pairs of antennae. Winnebago County’s native crustaceans include crayfish and shrimp. Both belong to the order Decapoda, which is from the Latin word for “10-footed” and refers to the five pairs of jointed or segmented legs that all decapods possess.