Aeshna cyanea (Blue Hawker) is a large hawker. Its range covers much of Europe and a small bit of Northern Africa. Males have a pattern of blue and green spots on the abdomen, while in most females all spots are green. In both sexes the sides of the thorax are yellow to green with black lines and the ante-humeral stripes are large and oval.
Blue Hawkers mainly inhabit well-vegetated ponds and canals, often shaded by trees, and are common visitors of garden ponds.