📸 PhotoPhoto: User:Tirin · CC BY-SA 3.0 · Wikimedia Commons Source
Sydney funnel-web spider
Atrax robustus (Sydney funnel-web spider · シドニージョウゴグモ)
Not Evaluated (NE) on the IUCN Red List yet.
💡 Everyday Comparisons for Size, Mass & Speed
- 💡 A 35 mm female is about 1.3 times the diameter of a 500-won coin (26.5 mm).
- 💡 Silk produced by this spider has been used as crosshairs in optical instruments (Animal Diversity Web).
Reference standards: coach bus ~12 m, mid-size car ~4.9 m, compact car ~1 t, basketball hoop 3.05 m, credit card 8.56 cm.
📖 1. Overview
The Sydney funnel-web spider (Atrax robustus) is a spider with large fangs and venom sacs that builds funnel-shaped white silk webs underground.
🦴 2. Anatomy & Morphology
Its body is a glossy blue-black, and its abdomen is covered with fine, velvety hairs. It has large fangs and venom sacs; females measure 35 mm and males 25 mm, with males being slimmer and longer-legged.
🔍 3. Ecology & Behavior
It catches and eats beetles, cockroaches, insect larvae, snails, millipedes, and occasionally frogs at the entrance of its funnel web. Males roam in search of mates, and females lay 90 to 120 eggs.
🇰🇷 4. Connection to Korea
No direct record connecting this species to Korea has been found.
📚 Sources & References
- • IUCN Red List: not evaluated (NE) — cross-checked with the Wikidata conservation-status entry
- • catalogueoflife.org — JKDD
- • wikidata.org — Q4661821
- • commons.wikimedia.org — File:Atrax robustus.jpg
- • animaldiversity.org — Atrax robustus
- • Silhouette: PhyloPic — Margot Michaud · CC0 1.0
Recorded dimensions are widely cited representative estimates from public literature and may vary by study or specimen.