August 27, 2014 at 5:49 am (plant-eating insects)
Tags: Dendrotettix quercus, graceful grasshopper, Jasper County, Jasper-Pulaski, Melanoplus bivittatus, Melanoplus gracilis, obscure bird grasshopper, post oak grasshopper, Pulaski County, Round Lake, Schistocerca emarginata, Schistocerca obscura, spotted bird grasshopper, Starke County Indiana, two-striped grasshopper
by Carl Strang
As I mentioned in the last post, grasshoppers pose problems different from other groups of singing insects. First, most of them don’t qualify as singing insects. Second, those that sing seldom do. Surveying them therefore must be on a visual rather than a hearing basis. Finally, even the visual approach isn’t simple. There are a lot of grasshopper species, sometimes distinguished by tiny structural features. A complete series of photos may be needed to assure an identification. You need every view, above, below, from the side, being sure to get good dorsal and lateral views of the end of the abdomen. Band-winged grasshoppers need to be captured and the wings spread. Also, the color of the hind tibia often is important. All of this was the lesson from grasshopper photos I took in Jasper, Pulaski and Starke Counties, Indiana, last week.
Some grasshoppers are relatively large and spectacular. The bird grasshoppers are the largest I have found to date in the region.
This appears to be the obscure bird grasshopper, common in places at the Jasper-Pulaski wildlife area but at or near the north end of its range.
This is a different bird grasshopper from Round Lake conservation area, my best sorting of characters pointing to the spotted or prairie bird grasshopper, Schistocerca emarginata (S. lineata in older references). Note the different colors of the head and tibia, compared to the preceding species.
The remaining grasshoppers I photographed apparently are all in the enormous spur-throated grasshopper group. Their identifications I think are correct, but a few more photos of certain parts of them would have helped.
The graceful grasshopper, Melanoplus gracilis, is the one of these I most likely have right. It lives in moist grassy areas.
This may be a post oak grasshopper, Dendrotettix quercus. I found it in a dry oak savanna. Superficially it resembles the previous, but note the different wings.
After poring through many reference photos, I had to conclude that this was a two-striped grasshopper. If I had looked at its back, I wouldn’t have needed to go to the trouble.
This grasshopper, like the previous one, didn’t give me a dorsal view, but I’m pretty sure it’s another two-striped.