A vocabulary of landscape — a landscape of words
1469 entries
firefly
A firefly is a beetle, not a fly, that produces light in an organ at the end of its abdomen and uses it to signal. The light is nearly cold, converting a very high fraction of its energy to light rather than heat. Each species has its own flash pattern in duration, interval, color, and flight path, so a field at dusk is carrying several conversations at once on different codes.
Etymology
The English name calls it a fly because English has always called any small flying insect a fly, which is also why we have dragonflies, mayflies, and butterflies, none of which are flies, either. The other English name, lightning bug, is regional and roughly splits the United States down the middle. The Japanese word is hotaru, and firefly-watching has been a summer outing there for over a thousand years.
Notes
Some Southeast Asian and Appalachian species flash in unison, thousands of individuals synchronizing across a hillside or a stand of mangroves, and the Great Smoky Mountains run a lottery for the viewing nights. Female fireflies of one genus mimic the flash code of another species to draw in males of that species, which makes them the only animals known to hunt by counterfeiting a language.