The next time you’re in a field, stop and take a close look at a few of the grasshoppers you find there. Chances are great that you will see tiny, red mites on some of them. These Red Grasshopper Mites, close relatives of ticks and spiders, go through three stages: larva, nymph and adult. The larvae (6-legged) attach to the base of a grasshopper’s wings, where they suck the grasshopper’s blood. The nymphs and adults (both 8-legged) are free-living and feed on grasshopper eggs. Each Red Grasshopper Mite nymph requires more than two grasshopper eggs to become an adult. An adult male Red Grasshopper Mite requires three grasshopper eggs for reproducing, and each female, seven to eight eggs. After breeding, a female mite deposits up to 4,000 eggs. Entomologists believe that mites reduce grasshopper survival and reproduction dramatically.
Hard as it is to believe with half a foot of snow remaining in the woods, this northern green-striped grasshopper (Chortophaga viridifasciata) was hopping around in the dry grass of a south-facing field in Hartland, Vermont yesterday. Most grasshoppers overwinter as eggs. They hatch in the spring, and the immature grasshopper nymphs look like miniature versions of their parents, except they lack wings and sexual organs. Northern green-striped grasshoppers, however, overwinter as nymphs in the northeast, which is why the one in the photograph is as large as it is (1/2-inch) this early in the season. (This grasshopper is one of the “band-winged grasshoppers,” which typically possess bands, or stripes, on their wings, as does the adult northern green-striped grasshopper.)