Tigrosa Grandis
Tigrosa Grandis
tigrosa grandis
Tigrosa grandis, commonly known as the giant tiger wolf spider, is a formidable yet fascinating arachnid native to the grasslands and floodplains of North America. Renowned for its impressive size and robust build, this wolf spider is an active nocturnal hunter that eschews traditional webs in favor of actively stalking and chasing down its prey. Its common and scientific names hint at its fierce, tiger-like striped patterns and large physical stature within the Lycosidae family. Despite their intimidating appearance, these spiders are vital contributors to their ecosystems, acting as natural pest controllers. They play a critical role in managing insect populations, especially in agricultural and suburban areas. Female Tigrosa grandis demonstrate remarkable maternal instincts, carrying their spherical egg sacs wherever they go and later carting dozens of tiny spiderlings on their backs, offering an extraordinary glimpse into arachnid parental care.
生息地: Typically found in temperate grasslands, open woodlands, agricultural fields, and riparian zones, often hiding under flat stones, logs, or leaf litter during the day.
外見
Tigrosa grandis is characterized by its large, robust, and hairy body, typically measuring 1.5 to 3.5 centimeters in length, with females being significantly larger than males. Its coloration is a mixture of cryptic grays, deep browns, and tan, dominated by a prominent light-colored median stripe running down the dark cephalothorax. The legs are thick and powerful, often displaying faint, darker banding. One of its most identifying features is its arrangement of eight eyes, including two exceptionally large, forward-facing posterior median eyes that gleam when caught by a flashlight beam at night.
界Animalia門Arthropoda綱Arachnida目Araneae科Lycosidae属Tigrosa
カテゴリ
Invertebrateレア度
Common
危険度
1/5 · 非常に低い
スナップ
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おもしろい事実
If you shine a flashlight over a grassy field at night, you can spot these spiders by their green eyeshine, caused by light reflecting off a membrane behind their retinas.
Unlike many spiders that spin webs to catch food, Tigrosa grandis is a cursorial hunter, meaning it relies on its impressive speed and physical strength to overpower prey.
When the spiderlings hatch, they climb onto their mother's back, clinging to specialized knobbed hairs until they are large enough to disperse and fend for themselves.
特殊能力
能力
Seismic Vibration Detection
Equipped with specialized sensory hairs called trichobothria, this spider can detect minuscule vibrations in the ground or air, allowing it to pinpoint prey and sense approaching predators without relying on sight.
能力
Low-Light Night Vision
Possesses large, highly sensitive eyes backed by a reflective membrane called a tapetum lucidum, giving it superb night vision crucial for nocturnal hunting.
能力
Mobile Maternal Protection
Females carry their egg sacs attached to their spinnerets and later transport hatched spiderlings on their abdomens, aggressively defending them from threats.
サイズと詳細
- 長さ
- 2-4 cm
- 体重
- 0.001-0.006 kg
- 寿命
- 1-3 年
- Top Speed
- 2 km/h
- 一度の産卵数
- 100-300
- 抱卵期間
- 14-28 日
食性と食事
An active predator that hunts a variety of terrestrial invertebrates and small insects on the ground.
年齢による違い: Spiderlings feed on tiny insects like fruit flies and springtails, while mature adults tackle much larger prey including large beetles and grasshoppers.
主な食物
- Field Cricket
- Differential Grasshopper
- Ground Beetle
- Sowbug
採餌方法
- Pursuit
生態系とのつながり
hunts
Differential Grasshopper
Melanoplus differentialis
Preys upon this common agricultural pest during night hunts.
eaten by
Yellow-horned Spider Wasp
Entypus unifasciatus
Often parasitized and paralyzed by this wasp to serve as food for its larvae.
competitor
Carolina Wolf Spider
Hogna carolinensis
Competes for ground-dwelling insect prey in the same grassland habitats.
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
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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
Tigrosa Grandisを見分けるには？
Tigrosa Grandis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。
Tigrosa Grandisの長さは何ですか？
2-4 cm
Tigrosa Grandisの体重は何ですか？
0.001-0.006 kg
Tigrosa Grandisの寿命は何ですか？
1-3 年
Tigrosa Grandisのtop Speedは何ですか？
2 km/h
Tigrosa Grandisは何を食べますか？
An active predator that hunts a variety of terrestrial invertebrates and small insects on the ground.
Tigrosa Grandisは通常どこに生息していますか？
Typically found in temperate grasslands, open woodlands, agricultural fields, and riparian zones, often hiding under flat stones, logs, or leaf litter during the day.
Tigrosa Grandisはどのように狩りをしますか？
Pursuit
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