How to Identify the Black-Tailed Skimmer Dragonfly in the Wild

The Black-Tailed Skimmer (scientific name: Orthetrum cancellatum) is a striking and common dragonfly species found across much of Europe and parts of Asia. Recognizable by its distinctive coloration and behavior, it is one of the most easily identifiable dragonflies for both amateur naturalists and seasoned entomologists. In this article, we will explore how to identify the Black-Tailed Skimmer in the wild by examining its physical characteristics, habitat preferences, behavior, and distinguishing features compared to similar species.

Physical Characteristics

Size and Shape

The Black-Tailed Skimmer is a medium-sized dragonfly, with adults typically measuring between 44 to 50 millimeters (1.7 to 2 inches) in body length. Its wingspan ranges from 70 to 80 millimeters (about 2.75 to 3 inches). The body is robust and slightly flattened, which helps distinguish it from other slender species.

Coloration

The most notable identifying trait of the Black-Tailed Skimmer is its coloration, which varies between males and females:

Males: Mature males have a powdery blue thorax and abdomen, created by a fine layer of pruinescence (a waxy bloom). The terminal segments of their abdomen are black, hence the name “black-tailed.” The combination of pale blue body and black tail is quite distinctive.
Females: Females lack the blue pruinescence and instead have a yellowish-brown thorax with dark markings. Their abdomen is yellow or olive with black spots or stripes running along it. The tail end isn’t completely black but darker than the rest of the abdomen, helping with identification.

Wings

The wings of the Black-Tailed Skimmer are transparent with characteristic black patches at the base near their body. These basal wing spots are larger on the hindwings and add a subtle but important clue when identifying this species in flight or perched.

The veins on their wings are dark and well-defined, which can be seen clearly when they hold their wings outstretched at rest—a typical posture for this species.

Eyes

The compound eyes of this dragonfly are large and widely spaced, usually exhibiting a greenish-blue color in males. In females, the eye coloration tends to be more brownish-green.

Habitat and Range

The Black-Tailed Skimmer thrives in a variety of freshwater habitats such as ponds, lakes, slow-flowing rivers, ditches, and marshes. It prefers sunny areas with open water bodies that provide ample perching sites such as reeds, stems, or flat rocks.

Geographic Distribution

This species is widespread throughout Europe—from southern Scandinavia down through central Europe—and extends eastward into parts of Asia including western Russia and Central Asia. In suitable habitats within this range, it can often be the most commonly seen dragonfly.

Behavior and Seasonal Activity

Observing behavior is critical when trying to identify species in the wild. The Black-Tailed Skimmer is often seen perched prominently near water surfaces. It frequently holds its wings horizontally when at rest rather than folded back over its body like damselflies.

Adult Black-Tailed Skimmers are active mostly during warm months from late spring through summer (May to August), depending on local climate conditions. Males often perch on exposed sunny spots to defend territories aggressively against rivals.

They hunt by flying short distances over water or vegetation to catch small flying insects mid-air. Their swift flight combined with frequent perching makes them relatively easy to spot but sometimes challenging to approach closely.

How to Differentiate from Similar Species

In regions where multiple skimmer dragonflies coexist, accurate identification can be tricky. Here are some key differences:

Versus Common Darter (Sympetrum striolatum)

The Common Darter has a more slender body.
Males lack the powdery blue pruinescence; they are usually red or orange.
The tail tip on Common Darters is not black but similarly colored as other abdominal segments.

Wing bases lack prominent black patches seen in Black-Tailed Skimmers.

Versus Four-Spotted Chaser (Libellula quadrimaculata)

Four-Spotted Chasers have four distinct dark spots on their wings.
Their bodies are bulkier.
They don’t have the blue body color or black tail tip.

They often rest with wings spread flat but have different wing markings.

Versus Eastern or Southern Blue Skimmer (Orthetrum brunneum / Orthetrum chrysostigma)

These species are related but tend to be smaller.
Their tails do not have strong black tips.
Blue coloration may differ slightly in hue.

Tips for Spotting and Photographing the Black-Tailed Skimmer

Timing: Visit habitats on warm sunny days when dragonflies are most active.
Location: Focus near still or slow-moving water bodies with abundant reeds or vegetation.

Approach: Move slowly and avoid casting shadows directly over perching spots.
Equipment: Use binoculars or a camera with good zoom to observe details without disturbing them.
Light: Early morning or late afternoon light enhances colors for photography without harsh glare.

Summary Checklist for Identification

Conclusion

The Black-Tailed Skimmer (Orthetrum cancellatum) is a beautiful and distinctive dragonfly species that can be identified reliably through a combination of its size, coloration patterns—especially the characteristic black tail in males—the black basal wing patches, and its preferred habitat near calm freshwater bodies.

Armed with this knowledge and careful observation skills, you can confidently spot these fascinating insects during your next nature walk by ponds or lakes. Watching their dynamic behaviors—perching under sunlight or darting after prey—adds an enriching dimension to enjoying wildlife in your local environment.

Whether you are a beginner looking to expand your dragonfly ID skills or an experienced enthusiast building an insect field guide collection, mastering identification of the Black-Tailed Skimmer opens up new opportunities for appreciation of these vibrant aerial predators in the wild.