October is the heart of autumn in many parts of North Amreica, with intensifying colors of fall foliage. Insects reflect the changing hues of plants, the better to camouflage themselves. As chlorophyll recedes, xanthophyll (yellow) and other carotenoids (orange), begin to manifest. Anthocyanins (reds to purples) become prominent, too. Could it be that insects feeding on those leaves take on the same colors? Perhaps the insects are merely responding the shrinking period of daylight as the leaves are doing.
This year, here in northeastern Kansas anyway, an exceptionally dry summer has resulted in subdued fall colors. Green leaves persist, even if they are withered from a record-breaking hard freeze last week. Some insects insist on being wholly green, or at least partly so.
Beige is an overwhelmingly common color of fall in pastures and fields, and even lawns thanks to our current drought. Insects of the same color merge seamlessly with grasses and weeds, becoming nearly impossible to detect unless they move. On windy days it is even more of a challenge. Thankfully, for entomologists and bugwatchers, insects frequently alight on, or are blown onto, sidewalks, the sides of buildings, and other surfaces where they stand out.