Crested Grouse-Locust (Nomotettix cristatus) from Hidden Valley WMA, Virginia, U.S. |
Talk about camouflage! This is a Crested Grouse-Locust (Nomotettix cristatus), hiding in plain sight on highland sandstone. Grouse-locusts are fingernail-sized grasshoppers who hide in barren patches between mosses and lichens in rocky, upland clearings. Grouse-locusts (Family Tetrigidae) are also called pygmy grasshoppers. The name stems from the Latin stem "tetricus" meaning "harsh." While most typical grasshoppers prefer grasslands, grouse-locusts thrive in much more barren, rocky environments. Often, they can thrive on rock outcrops much too small and nutrient-poor to support relatives.
Obscure Pygmy Grasshopper (Tetrix arenosa), Warrior's Path State Park, Tennessee, U.S. |
Most species are either completely flightless or have very limited flight abilities. Most are pebble-shaped, and some appear quite unusual like the Obscure Pygmy Grasshopper (Tetrix arenosa). While flight is not one of their strongest abilities, grouse-locusts are able to hop, climb, and swim very well. These are important skills to escape the terrestrial insectivores who hunt them.
Black-sided Pygmy Grasshopper (Tettigidea lateralis), East Tennessee State University, Tennessee U.S. |
Brunner's Grouse-Locust (Tetrix brunnerii). Kissick Alkaline Fen, Wisconsin, U.S. |
Other species are specialized to colder habitats, such as temperate deserts and glacial eskers, like the Brunner's Grouse-Locust. The harshness of sun and a lack of water in the desert, and cold winter climates with few sources of adequate food throughout the boreal forest, can be perfect places for grouse-locusts to outcompete other Orthoptera. Be sure to keep an eye out for them in the right habitats.
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