Damselfly

A slender relative of the dragonfly that holds its wings folded together over its back at rest — graceful aerial hunters of stream and pond edges, distinguishable from dragonflies by their delicate build.

Wings tell the difference

The easiest way to distinguish damselflies from dragonflies is what they do with their wings at rest:

Dragonflies hold all four wings straight out to the sides, like an aircraft.
Damselflies hold all four wings folded together over the back.

Both belong to the order Odonata — same insect group, similar lifestyle, but different evolutionary lineages and different wing/body proportions. Damselflies are generally slimmer, weaker fliers, and smaller than dragonflies.

Mating wheels

Both dragonflies and damselflies form distinctive mating positions known as the “wheel” or “heart” shape:

The male grasps the female by the back of her head with claspers at the tip of his abdomen.
The female curls her abdomen forward to receive sperm from the male’s secondary genitalia.
The pair flies in this attached-and-curled position, sometimes for hours.

The position resembles a rough heart shape — making damselfly mating one of the most visually recognizable insect behaviors.

Sperm competition

Male odonates have a sophisticated reproductive trick: their secondary genitalia include structures that can scoop out sperm previously deposited by other males before depositing their own. This is a clear case of physical sperm competition, and it has shaped the species’ male anatomy.

Aquatic naiads

Like dragonflies, damselflies have aquatic larvae called naiads that live underwater for months to years before metamorphosis. Damselfly naiads have three feathery gills at the rear of the abdomen — visible as three appendages, helping identify the larvae.

The naiads are predators of mosquito larvae, small aquatic invertebrates, and even tiny fish. They breathe through the gills, swim by undulating, and ambush prey with extendable lower jaws.

Visual range

Damselflies and dragonflies have the largest compound eyes of any insects — covering nearly the entire head. They detect movement faster than virtually any other animal; the response time of the visual system is roughly 5x faster than the human eye.