Broad-Bodied Chaser

The broad-bodied chaser is a compact, distinctively shaped dragonfly found across much of Europe and parts of temperate Asia, easily told apart from most other dragonflies by its noticeably flattened, wide abdomen. It belongs to the skimmer family (Libellulidae), a group generally characterised by broader bodies and shorter, stockier proportions than the slender hawkers.

Mature males develop a powdery blue bloom (pruinescence) over the abdomen, while females and immature males retain a golden-brown to yellowish abdomen with rows of pale spots along the sides, giving the species a striking difference in appearance between the sexes. Both sexes have distinctive dark, triangular patches at the base of each wing.

This species is well known for being one of the earliest dragonflies to colonise newly created ponds, sometimes appearing within the first year, which has made it a familiar sight in garden wildlife ponds. It plays a role in local food webs as both a predator of flying insects and, in its nymphal stage, of small aquatic invertebrates.

• Short, notably broad and flattened abdomen, wider than in most other dragonfly species
• Males: abdomen covered in a powdery pale blue bloom (pruinescence) as they mature
• Females and immature males: abdomen golden-brown to yellow-brown with two rows of small pale yellow spots along the edges
• Dark brown, triangular patches at the base of all four wings, a key identification feature
• Stocky build and comparatively short body length compared with hawker dragonflies
• Perches frequently on low vegetation or bare twigs near water, often returning to the same spot

Broad-bodied chasers favour small, shallow, sunny ponds, including newly dug garden ponds, as well as ditches and small lakes with some open water and marginal vegetation. They are widespread across Europe into western Asia and are often among the very first dragonfly species to appear at a freshly created pond, sometimes arriving within weeks of it filling with water. Adults are on the wing mainly from late spring into mid-summer, with a shorter flight season than many other dragonfly species.

Males are territorial and typically perch on a prominent low twig or stem near the water's edge, making short, fast sorties to chase off rival males or intercept passing insects before returning to the same perch, a habit that gives the "chaser" group its name. Both sexes feed on small flying insects such as midges and flies, caught and eaten on the wing. After mating, females lay eggs by repeatedly dipping the tip of the abdomen into the water surface while in flight, scattering eggs rather than inserting them into plant tissue. The aquatic nymphs are ambush predators of small invertebrates living among pond debris and vegetation, contributing to the pond's food web much as the adults do above the surface.

Eggs are broadcast onto the water surface and sink to settle among sediment or debris, hatching into aquatic nymphs that develop through incomplete metamorphosis with no pupal stage. Nymphs typically take one to two years to mature, depending on water temperature and food availability, before climbing out onto emergent vegetation to emerge as winged adults. Adult broad-bodied chasers usually live for only a few weeks during the warmer months, and the species overwinters underwater as a nymph, with one generation generally completing over one to two years.