Great Blue Skimmer Identification Guide
A large, pale powder-blue skimmer with amber-tinted wing bases, often seen patrolling shaded wetland edges.
Read the full Great Blue Skimmer encyclopedia entry →
Key Visual Features
The Great Blue Skimmer is one of the larger skimmer dragonflies, reaching about 2.2 inches (55 mm) in length, with a broad, powdery-blue abdomen in mature males.
- Body color: Males show a pale, chalky blue pruinescence over the abdomen that can look almost gray-blue, contrasting with a brown thorax that often retains a hint of its original color beneath a thin blue dusting. Females and immatures are brown with pale side stripes.
- Wings: Mostly clear but typically show a light amber or golden wash at the base, especially near the leading edge.
- Eyes: Blue-green and large, meeting broadly across the top of the head.
- Body shape: Thick-bodied with a moderately flattened abdomen, giving a heavier look than smaller skimmers.
- Legs: Dark and long, adapted for perching on twigs and snatching insects in flight.
Where and When You'll See It
Look for this species around shaded, spring-fed seeps, wooded swamps, and slow streams with muddy or organic-rich bottoms, often in partially forested settings rather than open ponds. It flies from late spring through summer, with peak activity on warm afternoons, and males often perch on low branches or reeds overhanging the water while patrolling a territory.
Similar-Looking Species
- Slaty Skimmer: Darker, more uniform slate blue with clear wings and no amber wash, versus the paler, amber-based wings of the Great Blue Skimmer.
- Eastern Pondhawk: Smaller and more turquoise, with a green face rather than blue-green eyes, and a habit of perching flat on leaves or the ground.
- Spangled Skimmer: Shows a distinct pale stigma and dark hindwing base spot, both absent here.
Take a moment to compare the overall tone of blue before settling on an identification — the Great Blue Skimmer's dusty, brownish-blue cast is genuinely paler than the deep slate of its close relative, and lighting conditions can make this harder to judge in the field than in a photo.
Quick ID Checklist
- Large skimmer, over 2 inches long
- Pale, chalky blue abdomen with a brownish thorax
- Amber or golden tint at the wing bases
- Blue-green eyes
- Found in shaded swamps, seeps, and wooded stream edges
Frequently asked questions
What color are the wings on a Great Blue Skimmer?
Mostly clear, but with a light amber or golden tint at the base of each wing, which helps separate it from the clear-winged Slaty Skimmer.
How big is the Great Blue Skimmer compared to other skimmers?
It is one of the larger skimmers, reaching over 2 inches in length, noticeably bigger and heavier-bodied than species like the Spangled Skimmer.
What habitat is most likely to have this species?
Shaded wooded swamps, spring seeps, and slow, muddy-bottomed streams are its preferred haunts, more so than open sunny ponds.
Are the eyes a useful identification feature?
Yes, the blue-green eyes that meet broadly across the top of the head are a helpful supporting clue alongside the pale blue abdomen.