Eight Spotted Skimmer: Quick Guide to Understanding This Unique Dragonfly

The Eight-spotted Skimmer is a fascinating dragonfly species that thrives in a variety of aquatic environments. Known for its striking appearance, this insect stands out from others in its group due to its unique wing markings and vibrant colors. In this article, we’ll explore everything you need to know about the Eight-spotted Skimmer, from its habitat preferences to its fascinating behavior.

Native to North America, the Eight-spotted Skimmer (Libellula forensis) is commonly found near lakes, ponds, and slow-moving streams, as well as in alkaline wetlands, spring runs, and sloughs. They are even known to venture away from water, occupying uplands or areas with clearings. With a wingspan of approximately 2.5 inches, these insects are easily recognizable by their distinct wing pattern, consisting of eight black-and-white spots.

In terms of behavior, Eight-spotted Skimmers exhibit territorial tendencies, especially with adult males who are frequently seen defending their turf against rival males. Mating and breeding take place near water bodies, creating new generations of dragonflies that continue to thrive in these ecosystems.

Description and Identification

Adult Male Characteristics

The Eight-spotted Skimmer (Libellula forensis) is a dragonfly species with distinct markings. Adult males feature:

• Black markings on their abdomen and thorax
• Four black spots on each wing, totaling eight spots

These markings make them easily identifiable among dragonflies.

Adult Female Characteristics

Adult female Eight-spotted Skimmers have subtle differences from males:

• Less prominent black markings on the abdomen and thorax
• Four black spots on each wing, similar to males
• Absence of white spots, which are present in males

The following comparison table highlights the main differences:

Understanding these characteristics helps in distinguishing between adult male and female Eight-spotted Skimmers.

Geographic Distribution and Habitat

Range Expansion

The Eight-spotted Skimmer is primarily found in the United States, particularly in the Pacific Northwest and the Rockies. Its range has been expanding to other parts of the country, including Washington (WA).

Habitat Preferences

The Eight-spotted Skimmer prefers a variety of habitats for survival and reproduction:

• Lakes and ponds
• Bogs
• Spring runs
• Sloughs
• Slow streams and backwaters
• Alkaline wetlands¹

These dragonflies are also known to use uplands and clearings away from water sources.

Comparison Table

Behavior and Ecology

Feeding Habits

Eight Spotted Skimmers, like other odonata species, are carnivorous and predominantly feed on insects. They are agile hunters and:

• Use their strong legs to snatch prey from mid-air
• Target a variety of insects, such as mosquitoes and flies

Mating and Reproduction

Mating in Eight Spotted Skimmers involves a unique process:

• Males guard their territories, waiting for receptive females
• Female and male skimmers form a “mating wheel” during copulation

Threats and Predators

These dragonflies face a number of threats:

• Predators include birds, spiders, and frogs
• Habitat loss can decrease their populations

Role in Ecosystem

Eight Spotted Skimmers play a significant role in their ecosystems:

• Act as bioindicators, reflecting ecosystem health
• Help control insect populations, by preying on mosquitoes and other insect pests

Comparison: Eight Spotted Skimmers vs. Twelve-Spotted Skimmers

Overall, understanding the behavior and ecology of the Eight Spotted Skimmer is essential for appreciating these fascinating creatures and their role in our environment.

Closely Related Species

Twelve-Spotted Skimmer

The Twelve-Spotted Skimmer is a close relative of the Eight-Spotted Skimmer. Both species belong to the Libellulidae family. Major features of the Twelve-Spotted Skimmer include:

• Twelve dark brown wing spots
• Males have eight additional white spots
• Females lack white spots
• Brown bodies with a yellow stripe along each side of the abdomen (young males)

Six-Spot Skimmer

There isn’t much information on a specific “Six-Spot Skimmer.” However, here are other key members of the Libellula genus:

• Libellula luctuosa: Widow Skimmer, featuring dark wing bands and white spots near wingtips
• Libellula pulchella: Twelve-Spotted Skimmer, with distinct spotted wing pattern (see above)

Ten-Spot Skimmer

A “Ten-Spot Skimmer” isn’t a recognized species. Nevertheless, the Libellulidae family holds several species worth noting:

• Libellula auripennis: Golden-winged Skimmer, displaying striking metallic yellow-orange wings
• Libellula semifasciata: Painted Skimmer, characterized by deep reddish-brown wing patches

Comparison Table:

In conclusion, the Twelve-Spotted Skimmer is the most closely related species to the Eight-Spotted Skimmer among the provided examples. Understanding different species in the Libellulidae family can help further appreciate the Eight-Spotted Skimmer’s unique characteristics and similarities.

Research and Observations

Field Guides and Books

The Eight-spotted Skimmer (Libellula pulchella) is a fascinating dragonfly species with distinct wing spots. To learn more about this species, you can refer to some published resources. Notably, there are a few field guides and books that mention this dragonfly, such as:

• Dragonflies through Binoculars (2011 edition)
• Dragonflies and Damselflies of the West (2009 edition).

These guides are excellent sources of information on Eight-spotted Skimmers, including identification, behavior, and distribution.

Online Resources

In addition to books and field guides, there are other available resources online, such as:

• BugGuide.net

BugGuide is a popular and reliable platform, offering valuable insights into the world of insects, including the Eight-spotted Skimmer. You can find information about the dragonfly’s scientific name, wing spots, and other characteristics on this platform.

Here is a comparison table of the resources mentioned in this section:

In summary, by utilizing these resources, you will be well-equipped to learn about and observe the Eight-spotted Skimmer in-depth.

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