Four-Spotted Skimmer

Fascinating facts about the Four-Spotted Skimmer

• The four-spotted skimmer holds the official title of state insect of Alaska. This dragonfly, Libellula quadrimaculata, belongs to the Libellulidae family and is found across Europe, Asia and North America. Its brown body and the four distinctive wing spots make it instantly recognisable. The state designation reflects the species' prominence even at the far-northern edge of its range.
• Larvae of the four-spotted skimmer develop over a two-year cycle before emerging as adults. During this period the young dragonflies live in water, feeding mainly on other aquatic insect larvae and tadpoles. The extended development means that new adults appear only after two summers of growth. This long larval stage influences the timing of the adult flight period each year.
• A distinct form called praenubila Newman displays exaggerated wing spots that set it apart from the typical four-spotted skimmer. These enlarged markings are linked to water temperatures experienced during larval development. The variant is recorded more often in Europe than in the Americas, showing a geographic bias in its occurrence. Such pronounced spots make the form especially noticeable among its peers.
• A special form of the four-spotted skimmer, known as praenubila Newman, displays unusually large wing spots. These exaggerated markings are linked to the temperature of the water in which the larvae develop, suggesting that warmer or cooler conditions influence spot size. Observations show that this variant shows up far more often in European populations than in those from the Americas, giving it a distinct regional pattern.
• Male four-spotted skimmers are noted for their fierce territoriality, actively chasing away any rival male that enters their area. They select prominent perches along pond and pool edges and habitually return to the same spots while patrolling for intruders. While perched they keep a clear view of the sky, favouring sections away from the sun that offer higher UV and blue-violet saturation, which enhances detection of flying prey.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Four-Spotted Skimmer

As the sun casts its warm glow upon the tranquil waters, the Four-Spotted Skimmer dances across the surface, its iridescent wings beating with a hypnotic rhythm, leaving a trail of shimmering light in its wake. With an effortless glide, this agile dragonfly navigates the aquatic realm, its large, piercing eyes scanning the surroundings for the slightest hint of movement, ever vigilant and ready to strike. In a fleeting flash of blue and green, the Four-Spotted Skimmer vanishes into the vegetation, its presence a whispered promise of the magic that lies just beneath the surface.

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