Ebony Jewelwing

Fascinating facts about the Ebony Jewelwing

• The ebony jewelwing's wings look black, but they're actually transparent — light just can't pass through them the way it does glass. Instead, the wing tissue is packed so densely with melanin that photons get trapped and absorbed, the same trick some deep-sea fish use to vanish in the abyss. What you're seeing isn't a colour but an absence, and it makes them nearly invisible when they hunt through dappled stream light.
• A male ebony jewelwing can see ultraviolet light, red light, and a third colour humans don't have a name for — one that sits between red and ultraviolet in their visual spectrum. Female jewelwings are camouflaged in shades of bronze and brown, but to a male's alien eyes she glows with a signal invisible to every predator that hunts them. Their world is literally a different painting than ours.
• In less than a second, an ebony jewelwing can spot a mosquito 30 centimetres away, lock onto it mid-flight, and snatch it from the air with legs that act like a basket. Their compound eyes have nearly 30,000 lenses each and can track movement 300 times per second — fast enough to see the wing beats of prey in slow motion while they're still airborne.
• Female ebony jewelwings choose their mates based on territory, not looks. A male plants himself on a rock in the middle of a stream and defends roughly a metre of water in both directions — a patch so small he can chase away rivals in seconds. Females drift downstream looking for males who hold the best real estate, because a prime territory usually means clean water and plenty of smaller insects to eat.
• The ebony jewelwing has lived in eastern North American streams unchanged for at least 160 million years, surviving the asteroid that killed the dinosaurs. They first evolved before flowers even existed on land. Their ancestors were hunting insects over Jurassic swamps, and every stream damselfly alive today is a direct descendant of that ancient lineage — making them living fossils that haven't needed to reinvent themselves since the age of reptiles.

At a glance

About the Ebony Jewelwing

In the dappled light of forest streams, the Ebony Jewelwing dances with an air of iridescent elegance, its delicate wings beating at a hypnotic pace as it flits from sun-kissed rock to rock. With a flash of its velvety black body and shimmering blue-green wings, this damselfly weaves a mesmerizing path through the water's edge, its large, gem-like eyes ever vigilant for the slightest hint of movement. As it settles upon a leaf or twig, its slender form seems to shimmer and glow, a fleeting embodiment of the forest's hidden magic.

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