Stream Cruiser

macromia transversa

The Stream Cruiser (Macromia transversa) is a remarkable and dynamic dragonfly known for its swift, tireless patrols over moving water. As its name suggests, this species is frequently observed cruising up and down streams and rivers in North America, acting as an apex aerial predator for small flying insects. With their striking green eyes and long, slender bodies, these insects are a favorite among nature enthusiasts and odonatologists who study their impressive flight capabilities. Beyond their aesthetic appeal, Stream Cruisers play a crucial role in aquatic and riparian ecosystems. Their life cycle bridges the gap between water and air; they spend months to years as voracious aquatic nymphs before emerging as winged adults. During their brief adult phase, they help control populations of mosquitoes and agricultural pests, making them a highly beneficial neighbor to have near freshwater waterways.

Lebensraum: Typically found patrolling along the banks and channels of clear, moderate-to-fast flowing streams, small rivers, and occasionally the rocky shores of large lakes.

Aussehen

The Stream Cruiser is a relatively large dragonfly characterized by a predominantly dark brown to black body accented with bold, bright yellow markings. A key identifying feature is the single prominent yellow ring around the upper middle of its abdomen, alongside lateral yellow stripes on its thorax. Mature adults boast striking, iridescent green compound eyes that meet at the top of the head. Their wings are largely transparent with dark veins, spanning approximately 8 to 10 centimeters, which allows for rapid and highly maneuverable flight.

ReichAnimaliaStammArthropodaKlasseInsectaOrdnungOdonataFamilieMacromiidaeGattungMacromia

Stream Cruiser

Kategorie

Insekten

Seltenheit

Common

Gefahr

1/5 · Sehr gering

Snaps

Mach den ersten Snap!

Interessante Fakten

Males are often seen flying the exact same 'patrol route' over a stream for hours on end, aggressively defending their territory from other dragonflies.

The nymph stage of the Stream Cruiser has exceptionally long, spider-like legs, which it uses to sprawl flat against the sandy or muddy bottoms of streams to camouflage itself.

Unlike many dragonflies that perch horizontally on twigs to rest, the Stream Cruiser prefers to hang vertically from leaves or branches when it finally stops flying.

Besondere Fähigkeiten

Stream Cruisers can fly continuously for hours along waterways without perching, relying on highly efficient wing muscles.

Their massive compound eyes consist of thousands of ommatidia, granting nearly a full 360-degree field of vision to effortlessly spot prey and avoid predators.

As aquatic nymphs, they possess a specialized hinged lower jaw that shoots out in milliseconds to snatch passing aquatic prey.

Maße und Details

Länge: 6-8 cm
Flügelspannweite: 8-10 cm
Gewicht: 0.001-0.005 kg
Lebenserwartung: 1-2 Jahre
Top Speed: 45 km/h
Gelegegröße: 500-2000
Brutzeit: 7-14 Tage

Ernährung und Fütterung

Adults are fierce aerial predators that snatch flying insects on the wing, while nymphs are ambush predators living underwater.

Altersunterschiede: Nymphs hunt aquatic invertebrates and small vertebrates like tadpoles underwater, whereas mature adults exclusively hunt flying insects in the air.

Hauptnahrung

Mosquitoes
Midges
Mayflies
Small aquatic invertebrates
Tadpoles

Nahrungssuche

Pursuit

Ökologische Zusammenhänge

eaten by

Purple Martin

Progne subis

Birds catch adult Stream Cruisers on the wing.

hunts

Common Malaria Mosquito

Anopheles quadrimaculatus

Stream Cruisers actively hunt swarming insects.

eaten by

Bluegill

Lepomis macrochirus

As nymphs, they are often preyed upon by freshwater fish.

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Sicherheit

Gefahr

1/5 · Sehr gering

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Häufig gestellte Fragen

Wie identifiziert man Stream Cruiser?

Der einfachste Weg, Stream Cruiser zu bestimmen, ist die Verwendung der Naturführer-App Snappit.

Was ist der/die/das länge von Stream Cruiser?

6-8 cm

Was ist der/die/das flügelspannweite von Stream Cruiser?

8-10 cm

Was ist der/die/das gewicht von Stream Cruiser?

0.001-0.005 kg

Was ist der/die/das lebenserwartung von Stream Cruiser?

1-2 Jahre

Was ist der/die/das top Speed von Stream Cruiser?

45 km/h

Was frisst Stream Cruiser?

Adults are fierce aerial predators that snatch flying insects on the wing, while nymphs are ambush predators living underwater.

Wo findet man Stream Cruiser normalerweise?

Typically found patrolling along the banks and channels of clear, moderate-to-fast flowing streams, small rivers, and occasionally the rocky shores of large lakes.