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.

生息地: 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.

外見

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.

界Animalia門Arthropoda綱Insecta目Odonata科Macromiidae属Macromia

Stream Cruiser

カテゴリ

昆虫

レア度

Common

危険度

1/5 · 非常に低い

スナップ

最初にスナップしよう！

おもしろい事実

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.

特殊能力

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.

サイズと詳細

長さ: 6-8 cm
翼開長: 8-10 cm
体重: 0.001-0.005 kg
寿命: 1-2 年
Top Speed: 45 km/h
一度の産卵数: 500-2000
抱卵期間: 7-14 日

食性と食事

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

年齢による違い: Nymphs hunt aquatic invertebrates and small vertebrates like tadpoles underwater, whereas mature adults exclusively hunt flying insects in the air.

主な食物

Mosquitoes
Midges
Mayflies
Small aquatic invertebrates
Tadpoles

採餌方法

Pursuit

生態系とのつながり

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.

特徴

このオブジェクトにはまだ特徴バッジが割り当てられていません。

別名

まだ別名はありません。

コレクション

テーマが追加されると、このオブジェクトのコレクションがここに表示されます。

安全性

危険度

1/5 · 非常に低い

まだ特別な安全上の注意はありません。

よくある質問

Stream Cruiserを見分けるには？

Stream Cruiserを識別する最も簡単な方法は、Snappit自然識別アプリを使用することです。

Stream Cruiserの長さは何ですか？

6-8 cm

Stream Cruiserの翼開長は何ですか？

8-10 cm

Stream Cruiserの体重は何ですか？

0.001-0.005 kg

Stream Cruiserの寿命は何ですか？

1-2 年

Stream Cruiserのtop Speedは何ですか？

45 km/h

Stream Cruiserは何を食べますか？

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

Stream Cruiserは通常どこに生息していますか？

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.