Insects diurnal

Blue Dasher

Pachydiplax longipennis

A pint-sized powerhouse of the backyard pond, the Blue Dasher is a master of aerial combat and bright summer colors. With its electric green eyes and powder-blue body, this common dragonfly is a favorite for garden photographers and nature lovers alike.

0 Sightings

0 Habitats

Quick Identification

straighten

Size

Length: 25–45 mm (1.0–1.8 in); Wingspan: 50–70 mm (2.0–2.8 in)

palette

Colors

Males feature a chalky, powder-blue abdomen with a black tip and metallic green or teal eyes. Females and juveniles are brownish with two distinct yellow stripes (dashes) on each side of the abdomen and a metallic green face.

visibility

Key Features

Powder-blue abdomen (males) with a black tip
Vivid metallic green eyes that meet at a point
Dark brown or amber patches at the base of the hindwings
Black and yellow striped thorax

When You’ll See Them

schedule

Activity pattern diurnal

brightness_5

Peak hours 10 AM - 4 PM

calendar_month

Season May-September

restaurant

Diet Carnivorous; they are generalist predators that catch flying insects mid-air, including mosquitoes, gnats, flies, and occasionally smaller moths or other dragonflies.

park

Habitat Found near still or slow-moving water, including backyard ponds, marshes, lakes, and slow streams with plenty of sunlight and perching vegetation.

bar_chart
Loading activity data...

Behavior

The Blue Dasher is the quintessential "percher" of the dragonfly world. Often found guarding a specific twig or reed near a pond, males are highly territorial and will aggressively chase away rivals or even much larger insects that enter their airspace. After a territorial skirmish or a successful hunt, they almost always return to the exact same perch, making them a favorite subject for backyard observers.

During the peak heat of the day, you may observe the Blue Dasher performing a "handstand" known as the obelisk posture. By pointing their abdomen straight toward the sun, they minimize the surface area exposed to solar radiation, allowing them to remain active and hunt when other insects must seek shade. They are incredibly agile fliers, capable of hovering, flying backward, and accelerating at speeds that make them a blur to the human eye.

photo_camera EverydayEarth exclusive

Camera Tips

To capture high-quality images or video of a Blue Dasher, you must capitalize on their habit of returning to the same spot. Identify a prominent, sunlit twig or reed that sticks out above the water or grass. This is their "throne." Mount your camera on a tripod or stable surface about 2 to 4 feet away from this perch. Because these dragonflies are small, using a macro lens or a camera with a high-resolution sensor that allows for tight cropping is essential for seeing the intricate venation in their wings.

Since Blue Dashers are most active in bright, direct sunlight, glare can be a challenge. Position your camera so the sun is at a slight angle (about 45 degrees) to the subject. This will highlight the "pruinescence"—the waxy, blue powder on the male's abdomen—without washing out the vibrant green of their eyes. If your AI camera allows for manual shutter speed settings, aim for 1/1000th of a second or faster to freeze their wings in flight, or use high-frame-rate video (60-120 fps) to capture their erratic takeoff maneuvers in slow motion.

You can actually "bait" a location for Blue Dashers without using food. Simply place a few bamboo garden stakes or tall sticks in a sunny spot near a water source. Ensure your chosen stake is the tallest point in the immediate area, and the Blue Dasher will naturally choose it as its primary lookout. Focus your camera on the top 2 inches of the stake. This predictable behavior makes them one of the easiest insects to track with AI-powered motion-trigger cameras once you have established the ideal landing zone.

Similar Species

Species that look similar or are commonly confused with Blue Dasher.

Eastern Pondhawk

The Pondhawk is slightly larger and has a green face and solid blue-green thorax, whereas the Blue Dasher has a striped thorax and green eyes.

Blue Corporal

Corporals have two short dark stripes on the front of the thorax and appear earlier in the spring than the Blue Dasher.

Frequently Asked Questions

Blue Dasher are most active during the warmest parts of the day, typically between 10 AM and 4 PM, when the sun provides the energy they need for high-speed flight.

The best way to attract them is to install a small pond or water feature and provide plenty of vertical perches like reeds, tall grasses, or garden stakes in a sunny location.

They are voracious predators that eat a variety of small flying insects, making them excellent natural pest control for mosquitoes and flies.

Yes, they are one of the most widely distributed dragonflies in North America and adapt very well to suburban gardens, parks, and golf course ponds.

Look for the metallic green eyes and the black-and-yellow striped thorax; most other blue dragonflies, like the Eastern Pondhawk, have different eye colors or solid-colored thoraxes.

Record Blue Dasher at your habitat

Connect a camera to start building your own species record — AI identifies every visitor automatically.

Join free Identify a photo