- · Grid units represent actual meters (m); human and animals are drawn to the exact same scale with original silhouette aspect ratios preserved.
- · When a size range is recorded (e.g. 1–1.6m), the lower bound is used for scale comparison.
- · Yellow dashed line shows recorded total body length (including tail), which may differ from silhouette width due to posture.
- · Chestnut weevil silhouette: PhyloPic — Emil Schmidt (vectorized by Maxime Dahirel) · CC BY 3.0 (Curculio nucum)
- · Human silhouette: PhyloPic — NASA · Public Domain Mark 1.0
Chestnut weevil
Curculio sikkimensis (Chestnut weevil · クリシギゾウムシ)
Not Evaluated (NE) on the IUCN Red List yet.
💡 Everyday Comparisons for Size, Mass & Speed
- 💡 Its body length of 10 mm is slightly more than half the size of a Korean 10-won coin (diameter 18 mm) (Comparison).
- 💡 The National List of Species of Korea notes that the larvae develop inside chestnut fruits.
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 chestnut weevil is a beetle in the family Curculionidae that lays eggs in the nuts of chestnut and oak trees, where its larvae develop inside. It is distributed in Korea, Japan, China, and India.
🦴 2. Anatomy & Morphology
Its body length excluding the rostrum is 6–10 mm, and its dark brown background is densely covered with yellowish-gray scales. The rostrum is longer than half the body length, and in females the rostrum is nearly as long as the body.
🔍 3. Ecology & Behavior
Adults lay eggs in the nuts of chestnut and oak trees, and the larvae grow inside chestnut fruits. Adults emerge from mid-July to October and are attracted to light traps.
🇰🇷 4. Connection to Korea
The National List of Species of Korea records that it inhabits farmland and mountain broadleaf forests in northern, central, and southern Korea as well as Jeju Island.
📚 Sources & References
- • IUCN Red List: not evaluated (NE) — cross-checked with the Wikidata conservation-status entry
- • catalogueoflife.org — 32JG7
- • 국가생물종목록(국립생물자원관) ktsn 120000016309 — https://species.nibr.go.kr/home/mainHome.do?cont_link=009&subMenu=009002&contCd=009002&ktsn=120000016309
- • wikidata.org — Q56351909
- • species.nibr.go.kr — mainHome.do
- • Silhouette: PhyloPic — Emil Schmidt (vectorized by Maxime Dahirel) · CC BY 3.0 (Congeneric silhouette — Curculio nucum)
Recorded dimensions are widely cited representative estimates from public literature and may vary by study or specimen.