Getting Started with Dragonfly Identification

With over 6,000 species worldwide, dragonflies can seem daunting to identify at first. But many regions have a manageable number of common species, and once you know what to look for, telling them apart becomes a genuinely rewarding skill. This guide walks you through the key features to observe and introduces some of the species you're most likely to encounter.

Key Features to Look For

Before diving into specific species, it helps to build a mental checklist of the features that matter most for identification:

  • Body colour and pattern: Note the base colour and any bands, spots, or markings along the abdomen.
  • Wing shape and venation: Are the wings broad or narrow? Do they have coloured patches or a distinctive shape at the base?
  • Eye colour: Dragonfly eyes are large and compound — colour can be a useful clue, especially in mature adults.
  • Size: Estimating body length (small: under 40mm, medium: 40–60mm, large: over 60mm) narrows the field quickly.
  • Flight behaviour: Does it hover repeatedly, patrol a beat, or perch frequently? Each behaviour is characteristic of certain groups.

Dragonflies vs Damselflies — Know the Difference

Before identifying species, make sure you're looking at a dragonfly rather than a damselfly. The easiest way to tell them apart at rest is wing position: dragonflies hold their wings open horizontally, while most damselflies fold them back along their body. Dragonflies are also generally more robust and faster in flight.

Common Species to Know

Emperor Dragonfly (Anax imperator)

One of Europe's largest dragonflies, the Emperor is unmistakable. Males have a vivid sky-blue abdomen with a dark dorsal stripe; females are green. It's a powerful patrolling species found over large ponds and slow rivers from May to August.

Common Blue Damselfly (Enallagma cyathigerum)

One of the most abundant species in the UK and much of Europe, this damselfly is electric blue with black markings. It flies low over open water and is often seen in large numbers at well-vegetated ponds.

Four-spotted Chaser (Libellula quadrimaculata)

Named for the four dark spots — one on each wing — this medium-sized dragonfly is stocky, golden-brown, and highly territorial. It perches prominently and launches short aerial attacks on intruders.

Broad-bodied Chaser (Libellula depressa)

Instantly recognisable by its flattened, wide abdomen — powder blue in males, yellow-brown in females. A common coloniser of new garden ponds, making it a favourite among pond gardeners.

Common Darter (Sympetrum striolatum)

A late-season species active well into autumn. Males are red, females yellow-brown. Darters habitually return to the same perch and are often found far from water, basking on paths and fences.

Tips for Better Identification in the Field

  1. Carry a field guide specific to your region — regional guides are far more useful than global ones.
  2. Use binoculars. Close-focus models (minimum focus of 1.5–2m) work best for insects.
  3. Photograph everything you can — review images at home to confirm tricky IDs.
  4. Note the habitat: bog species won't appear at garden ponds, and river specialists won't be found in still water.
  5. Record the date — flight periods are a valuable ID tool, as many species are only on the wing for a few months.

Building Your Knowledge Over Time

Dragonfly identification is a skill that deepens with experience. Start with the common, distinctive species in your area and build outward. Online recording schemes and local natural history groups are excellent resources for getting your sightings confirmed and connecting with other enthusiasts.