Species of the Month

August’s Species of the Month is our first insect to be featured. A frequent sight during the summer is the differential grasshopper. There are many species of grasshopper around the world, this one is widespread through the US, although it is absent from some states. If you live in most of the US, odds are good that you’ve seen one. While we often think of them as a hopping insect (hence the name) they also fly. Here in Washington we don’t have the differential, but a large grasshopper here makes a clacking sound as it flies past. Along with crickets, the grasshopper is one of those critters I associate with the shortening days and cool nights as we begin transitioning into fall.

Adult differential grasshopper (from Bug Guide)

Scientific name: Melanoplus differentialis

Kingdom: Animalia (animals)

Class: Insecta (insects)

Order: Orthoptera (grasshoppers, crickets, and katydids)

Range: Mexico to Alaska via the Midwest and Prairie Provinces, southern New England to North Carolina, American Southwest

Habitat: Grassy areas

Lifespan: About a year

Diet: Grasses and forbs           

Predators: Mites, nematodes, bee flies, blister beetles, Scelionid wasps, Tachinidae flies, Sarcophagidae flies, skunks, shrews, moles, salamanders, snakes, toads, passerine birds

Conservation Status: Species of least concern

Grasshopper eggs (from ID Tools)

Other Information: The differential grasshopper is a crop pest in many areas where it is found. When congregated in large enough numbers, a swarm can be devastating. Egg packets are laid in soil, a half to two inches deep. Larvae hatch in spring and go through a series of molts before reaching adulthood in 40-60 days. They are noted for the dark chevrons on their jumping legs and come in many color morphs, ranging from to olive green to black to almost white. They are edible for humans and make good fishing bait.

Differential grasshopper nymph (from Cape May Wildlife)

This week’s information comes from Texas A&M, Insect Identification for the Casual Observer, and University of Kentucky. Photo credits: Bug Guide, ID Tools, Cape May Wildlife