Villagers Just Caught the Largest Ever Aquatic Insect And It’s Bigger Than Your Hand

Villagers from a village in the Sichuan province of China just collected the largest ever aquatic insect specimen.

The bug, a massive dobsonfly, has a wingspan of more than 8 inches. The previous record-holder for the world’s largest aquatic insect was a South American helicopter damselfly, which had a wingspan of 7.5 inches.

Helicopter damselfly (Megaloprepus coerulatus)

Though dobsonflies are relatively common (there are over 200 species across Asia, Africa and South America), one of this size had been unheard of until now.

Looking at a dobsonfly can actually be very misleading. For one, those massive, grisly-looking mandibles protruding from its head are actually only used for mating. Males flaunt them to impress the females and hold them in place during the actual mating process.

A male dobsonfly (on the right) courts a female before mating. Click to enlarge

Also, those massive wings are pretty much all for show. The insect almost never flies, preferring to spend the bulk of its time in the water (both underwater and on the surface), or sheltering underneath rocks.

Dobsonflies are also a biological indicator of water quality. They prefer clean water with very low levels of pollution and a relatively neutral pH. If water quality falls below their standards, they will leave and find a new body of water to call home.

The villagers gave the record-setting specimen to the Insect Museum of West China.

(h/t Discovery)

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