Spinybacked Orbweaver
Spinybacked Orbweaver
gasteracantha cancriformis
The Spinybacked Orbweaver is a fascinating and highly recognizable spider known for its distinct, crab-like appearance and colorful abdomen. Found throughout warmer regions of the Americas, this small arachnid is a welcome addition to gardens, where it acts as a natural pest controller by weaving complex, sticky webs to snare flying insects. Despite its intimidating spines, this spider is entirely harmless to humans and rarely bites unless severely provoked. Observing a Spinybacked Orbweaver in its web provides a wonderful glimpse into the intricate engineering of nature. They are particularly active during the day, making them an excellent subject for nature enthusiasts and photographers looking to spot unique wildlife. Their geometric webs are often adorned with small silk tufts, adding to their visual charm.
生息地: Found in citrus groves, hardwood forests, suburban gardens, and forest edges where they spin webs between trees and shrubs.
外見
This spider is easily identified by its broad, hardened abdomen featuring six prominent spines, typically red or black, projecting from the sides and rear. Females measure about 5 to 10 millimeters in length and 10 to 13 millimeters in width, showcasing vibrant colors like bright white, yellow, or orange on their upper abdominal surface, speckled with black spots. In contrast, males are significantly smaller, measuring only 2 to 3 millimeters, and are a drab gray or brown color without the prominent spines or bright coloration of their female counterparts.
界Animalia門Arthropoda綱Arachnida目Araneae科Araneidae属Gasteracantha
カテゴリ
Invertebrateレア度
Common
危険度
1/5 · 非常に低い
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おもしろい事実
After mating, the male often dies shortly after, and the female dies soon after producing her single, carefully wrapped egg sac.
Only the female Spinybacked Orbweaver possesses the large, colorful abdomen with prominent spines; the males are tiny, drab, and lack notable spines.
They construct a distinctive tufted web, adding small white silk dots along the support lines to make the web visible to birds so they do not fly through it.
特殊能力
能力
Aposematic Shield
The bright coloration and sharp spines on the female's abdomen serve as a physical and visual deterrent to potential predators like birds.
能力
Web Vibration Sensing
Using highly sensitive slit sensilla, the spider detects subtle vibrations in its web to pinpoint the exact location of trapped prey.
能力
Silk Tuft Signaling
Adds visible tufts of white silk along its web lines to prevent birds from accidentally flying through and destroying the web.
サイズと詳細
- 長さ
- 0-1 cm
- 体重
- 0.00005-0.0003 kg
- 寿命
- 0-1 年
- 一度の産卵数
- 100-260
- 抱卵期間
- 14-35 日
食性と食事
Captures and feeds on small flying insects that become entangled in its strong, vertical orb web.
年齢による違い: Spiderlings consume smaller insects such as midges, while mature females target larger flies and beetles.
主な食物
- Fruit flies
- Mosquitoes
- Moths
- Beetles
採餌方法
- Ambush
生態系とのつながり
eaten by
Blue mud dauber wasp
Chalybion californicum
Wasp captures this spider to provision its mud nests for its larvae.
hunts
House fly
Musca domestica
The spider preys on house flies that fly into its sticky web.
eaten by
Carolina Chickadee
Poecile carolinensis
Preys on the spider, though it may avoid larger, spiny females.
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
Spinybacked Orbweaverを見分けるには？
Spinybacked Orbweaver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。
Spinybacked Orbweaverの長さは何ですか？
0-1 cm
Spinybacked Orbweaverの体重は何ですか？
0.00005-0.0003 kg
Spinybacked Orbweaverの寿命は何ですか？
0-1 年
Spinybacked Orbweaverは何を食べますか？
Captures and feeds on small flying insects that become entangled in its strong, vertical orb web.
Spinybacked Orbweaverは通常どこに生息していますか？
Found in citrus groves, hardwood forests, suburban gardens, and forest edges where they spin webs between trees and shrubs.
Spinybacked Orbweaverはどのように狩りをしますか？
Ambush
Spinybacked Orbweaverの一度の産卵数は何ですか？
100-260
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