Yes, this is an adult pygmy grasshopper, family Tetrigidae. It was grooming itself on a boardwalk, and I managed to catch it with its wings out. They fly surprisingly well given these body proportions.
in rocky floodplain
Many grasshopper species persist deep into autumn. The Mottled Sand Grasshopper, Spharagemon collare, is one of those, at least here on the Front Range.
This tiny insect is a male Red-headed Bush Cricket, Phyllopalpus pulchellus. He generates a very loud tinkling song for such a small animal.
Orthoptera is an order of insects with paurometabolous or incomplete metamorphosis, including the grasshoppers, crickets, cave crickets, Jerusalem crickets, katydids, weta, lubber, Acrida, and locusts. Many insects in this order produce sound (known as a "stridulation") by rubbing their wings against each other or their legs, the wings or legs containing rows of corrugated bumps. The tympanum or ear is located in the front tibia in crickets, mole crickets, and katydids, and on the first abdominal...