📸 PhotoPhoto: yvesbas · CC BY 4.0 · Wikimedia Commons Source
Eastern Red-rumped Swallow
Cecropis daurica (Eastern Red-rumped Swallow · コシアカツバメ)
💡 Everyday Comparisons for Size, Mass & Speed
- 💡 Under house eaves and bridges, it builds several mud nests side by side shaped like bottles laid horizontally (National List of Species of Korea).
- 💡 It is a summer visitor commonly seen around urban and rural neighborhoods (National List of Species of Korea).
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 eastern red-rumped swallow is a common summer visitor that breeds nationwide around human homes, nesting in colonies under eaves and similar structures.
🦴 2. Anatomy & Morphology
In male winter plumage, the crown, back, and shoulders are glossy purplish blue-black, and the rump is rusty red. The underparts are buff, and the deeply forked tail has an outer pair of feathers almost 2.5 times as long as the central pair.
🔍 3. Ecology & Behavior
It builds mud nests shaped like a long bottle laid on its side in colonies under eaves, bridges, and roofs, laying 4–5 eggs in May–July (months 5–7). After breeding, it often travels in family groups.
🇰🇷 4. Connection to Korea
According to the National List of Species of Korea, it is distributed nationwide and is a common summer visitor that breeds across the country.
📚 Sources & References
- • IUCN Red List LC (2024) — https://www.iucnredlist.org/species/103812643/264559502
- • IUCN Red List category LC — latest assessment at iucnredlist.org
- • doi.org — avilist.v2026
- • iucnredlist.org — 264559502
- • 국가생물종목록(국립생물자원관) ktsn 120000001995 — https://species.nibr.go.kr/home/mainHome.do?cont_link=009&subMenu=009002&contCd=009002&ktsn=120000001995
- • wikidata.org — Q27075446
- • commons.wikimedia.org — File:Cecropis daurica, Fufeng County, Baoji, Shaanxi, China
- • species.nibr.go.kr — mainHome.do
- • Silhouette: PhyloPic — Andy Wilson · CC0 1.0
Recorded dimensions are widely cited representative estimates from public literature and may vary by study or specimen.