Invertebrates can be found all over Clarks River National Wildlife Refuge! These spineless creatures live at the bottom of the Clarks River, the tops of the bottomland hardwood forests, and everywhere in-between. 

  • Viceroy Butterfly

    Viceroy Butterfly

    In 1990 the Viceroy became the official state butterfly of Kentucky. It is often confused with the Monarch Butterfly, but they are easy to tell apart if you know what to look for! The Viceroy Butterfly has a horizontal line across it's bottom wings, the Monarch lacks this line. 

  • Dragonfly

    dragon fly

    Many different species of dragonflies can be found on the refuge, each one having it's own unique colors and characteristics. Did you know that dragonflies live most of their lives under water? It's true! These inverts spend their time as nymphs in the water before they hatch out as adult dragonflies.

  • Eastern Eyed Click Beetle

    eastern eyed click beetle

    This beetle can often be found on the sides of trees. It has large fake eyes meant for scaring away predators. While it looks scary, this critter's defense is actually harmless. The beetle makes a clicking sound when it snaps a spine under it's thorax. This is how it got its name.

  • Crayfish


    The crayfish, also know as a crawdad, looks much like a small lobster. However, crayfish only live in fresh water, and they grow to be about 6 inches in length. There are many different species of crayfish, in fact around 350 species can be found just in the United States. These invertebrates live in water, and when things start to get dry they dig a burrow. You might see their mud chimney while walking beside a body of water..

  • Monarch Butterfly

    Monarch Butterfly 150x159

    The monarch butterfly is easily one of the most well-known butterflies in America. They are known for their bright orange and black pattern that resembles Kentucky's state butterfly (the viceroy), and their amazing migration journey made each year to Mexico.

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