Johnny Darter

The Johnny Darter is one of the most widespread darters in North America, found in a huge variety of clean-water habitats from small streams to large rivers. Its mottled brown-and-grey camouflage pattern provides near-perfect concealment on a sandy or gravelly substrate.

Breeding males develop a blackened head and intensified markings. Males select a small territory under flat stones where females deposit eggs, which the male then guards until hatching. This nest-guarding behaviour is fascinating to observe.

As one of the more adaptable darters, the Johnny Darter tolerates a wider range of conditions than many congeners, though it still requires cool, clean water and a meat-based diet.