A flash of blue above a garden pond or a red insect settling on a fence can turn a casual walk into a wildlife-spotting expedition. British dragonflies are varied, but identifying them need not be guesswork. Body shape, wing markings, behaviour, season and habitat often reveal more than colour alone.
This guide covers recognisable dragonfly species in the UK and practical clues for telling similar insects apart. A clear photograph helps, but careful observation is the best starting point.
Dragonfly or damselfly: the first identification check
Dragonflies and damselflies belong to the insect order Odonata. Dragonflies generally have stout bodies, powerful flight and large eyes that nearly meet on the head. Most rest with their wings spread. Damselflies are usually slimmer, have separated eyes and often fold their wings along their bodies while resting.
Wing position has exceptions, so combine several clues. Learning these damselfly differences is useful before comparing dragonfly species. For smaller, delicate insects, a guide to common UK damselflies is a helpful next read.
British dragonflies to look for
Emperor dragonfly
One of Britain’s largest dragonflies, the emperor is a commanding sight over sunny ponds and lakes. Mature males have a vivid blue abdomen with a dark central stripe and a green thorax; females are generally greener. Watch for territorial males tirelessly patrolling open water and chasing other dragonflies.
Southern hawker
This large hawker displays conspicuous green markings on the thorax and green or blue abdominal patches. Towards the abdomen tip, the markings form broader coloured bands. Southern hawkers frequent garden ponds and woodland edges, sometimes investigating people at close range. They are strong fliers, even in shaded surroundings.
Migrant hawker
Smaller than the southern hawker, the migrant hawker has blue abdominal spots in mature males and a distinctive yellow marking near the abdomen base. Often seen in late summer and autumn, it hunts around lakes, wetlands and sheltered paths. Several individuals may forage in the same area.
Brown hawker
Distinctly amber-brown wings are the giveaway. This dragonfly’s brown body and warm-tinted wings distinguish it from brighter hawkers, even when it passes quickly. It patrols lakes, ponds and sheltered waterways and can be frustratingly reluctant to land. Try observing the wings against the sky.
Broad-bodied chaser
Look for a short, wide, flattened abdomen and dark patches at the bases of all four wings. Mature males are powdery pale blue; females and immature males are golden brown. Territorial males regularly return to exposed perches beside ponds, offering an excellent chance to study their shape.
Four-spotted chaser
Both sexes have similar brown and yellow colouring. The key feature is an extra dark mark partway along the leading edge of each wing: four distinctive additional spots. Found at ponds, lakes and bog pools, this species can resemble a female broad-bodied chaser until the wing markings come into view.
Black-tailed skimmer
A mature male has a powder-blue abdomen ending in a clearly black section and greenish eyes. Females and immature males are yellow with two dark lengthwise lines. Unlike chasers, skimmers lack large dark triangles at the hind-wing bases. Look for them resting on sunny bare ground beside open water.
Common darter and ruddy darter
Both are relatively small dragonflies that repeatedly dart from perches to catch prey. Male common darters are orange-red with pale stripes on their legs. Male ruddy darters are deeper red, with entirely black legs and a club-shaped abdomen. Females and immature insects look less distinctive, making leg colour particularly valuable.
Golden-ringed dragonfly
This impressive species has a long black body encircled by bright yellow rings and striking green eyes. It breeds in flowing water, especially acidic streams and rivers, and is widespread in northern and western Britain. The female has an unusually long egg-laying appendage. Adults also hunt away from streams over nearby heathland.
Black darter
On northern or western moorland, a small dark dragonfly beside an acidic pool may be a black darter. Mature males are predominantly black, while females and immature males are yellow-brown with dark markings. Its bog and heathland habitat helps distinguish it from dragonflies commonly found beside urban garden ponds.
Where and when to find dragonflies
Dragonfly habitats provide a useful second opinion on identification. Emperors, chasers and skimmers breed in suitable still waters; golden-ringed dragonflies favour streams, while black darters are associated with acidic pools. Adults can travel away from breeding areas, however, so habitat is a clue rather than proof.
Most sightings occur from late spring to early autumn, although flying seasons vary by species, region and weather. Broad-bodied chasers are conspicuous earlier in the season, migrant hawkers later, and common darters can remain active well into autumn. The British Dragonfly Society provides flight-period and distribution information for checking uncertain sightings.
How to identify a dragonfly you have spotted
Imagine finding a blue dragonfly sitting on a waterside stone in July. Instead of calling it an emperor, look at the abdomen. Is it long and narrow or broad and flattened? Does it end in black? Are there large dark patches at the wing bases? A blue abdomen with a black tip and no large wing-base patches suggests a male black-tailed skimmer.
If possible, photograph the insect from above and from the side. Record its location, date, habitat, approximate size and behaviour. Newly emerged adults may be paler than mature individuals, females can differ dramatically from males, and older insects sometimes darken. Avoid catching or handling them merely for identification.
An empty larval skin clinging to a reed is another fascinating find: a dragonfly emerged from the water nearby. Explore the dragonfly life cycle to understand this transition, or read about wildlife pond plants that support aquatic insects.
Frequently asked questions
How many dragonfly species are found in the UK?
The answer depends on whether you count established breeders, regular migrants and rare visitors. The British Dragonfly Society’s UK checklist separates regularly occurring species from exceptional records and includes damselflies as well as dragonflies.
What is the most common dragonfly in Britain?
The common darter is among the most widespread and familiar. It uses many kinds of still water, including garden ponds, although the species you encounter most will depend on your region and season.
Are blue dragonflies always male?
No. Blue colouring is common in mature males of several species, but some females can also be blue. Immature males may be brown or yellow. Check shape and markings before deciding.
Can dragonflies sting?
Dragonflies do not sting. They hunt other insects and generally pose no threat to people. Give them space to rest, hunt and reproduce without disturbance.
Build confidence with every sighting
A broad blue chaser, an amber-winged hawker and a yellow-ringed stream dragonfly look strikingly different once you notice the right clues. Start with silhouette and wing markings, then check habitat, season and regional distribution. Over time, your own photographs and notes will make UK dragonfly identification increasingly rewarding.