It’s grasshopper season!
By the end of summer, most grasshoppers have completed their five or so molts and have become adults – complete with functional wings. Now, as we walk and drive through our prairies, these fully-formed adult grasshoppers (along with katydids and tree crickets) seem to be everywhere. They explode from our feet like popcorn – especially in areas of shorter vegetation. And they’re hungry. We see them feeding on sunflowers, goldenrod, grasses and almost every other kind of plant in the prairie. As in other groups of species, the diversity of grasshopper species (108 species in Nebraska) leads to a diversity of feeding habits. Some feed high in the canopy, others low. Some feed mainly on grasses, others on forbs. Some eat from a wide range of species, others from just a few.
Predators, of course, respond enthusiastically to the profusion of grasshoppers. Rather than taking over the world, late summer grasshoppers become the targets of any creature that can catch up with them. This includes birds, mammals, reptiles, and large invertebrate predators, but also tiny parasites and microbes. To hungry predators, grasshoppers are just tasty machines that convert vegetation into protein-rich food – and they’re EVERYWHERE!
The prairie is also a noisy place when grasshoppers, katydids, and tree crickets reach adulthood. Much of the communication between these species is through sound, and it can be hard to hear the rustling of autumn prairie leaves in the wind over the buzzes and whines of insect courtship.
Besides leading females to males, that incessant insect noise acts as a warning to herbivore and predator alike…
“You’d better eat up now – winter is coming!”