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🧬 Biological Classification (Kingdom to Species)Hydrobates monorhis

Kingdom

Animalia

Phylum

Chordata

Class

Aves

Order

Procellariiformes

Family

Hydrobatidae

Genus

Hydrobates

Species

Hydrobates monorhis

Aves🥩 Carnivore

Swinhoe's Storm Petrel

Hydrobates monorhis (Swinhoe's Storm Petrel · Swinhoe's Storm Petrel)

🛡️ Conservation Status (IUCN Red List)NT (Near Threatened)

DDData Deficient

LCLeast Concern

NTNear Threatened

VUVulnerable

ENEndangered

CRCritically End.

EWExtinct in Wild

EXExtinct

Geological Era

Extant

Diet

Carnivore

Length · Height

19cm · No data

Mass · Top Speed

39g · No data

Habitat & Fossil Locality

Open seas and remote islands (burrows under grass roots on slopes and in rock crevices)

💡 Everyday Comparisons for Size, Mass & Speed

💡 Because it returns to its burrow around 9 p.m. and heads back out to the open sea before dawn, it is hard to see during the day (Encyclopedia of Korean Culture).
💡 Its weight of 39 g is lighter than a single chicken egg (about 60 g) (Comparison).

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.

📊 Mass & Speed Index (0–100)

⚖️ Mass Index (Blue Whale ~190 t = 100, log scale)19

Site-computed relative index from recorded values; not a formal scientific metric.

#바다제비#Hydrobates monorhis

📖 1. Overview

Swinhoe's Storm Petrel is a small seabird measuring about 19 cm in body length; in Korea, it is a summer visitor arriving in late April to May and breeding only on remote islands in the East Sea, South Sea, and Yellow Sea.

🦴 2. Anatomy & Morphology

Its bill is black with a hooked tip and tubular nostrils on top. Its wings, body, and tail are covered in nearly black feathers, with white feathers between the body and tail.

🔍 3. Ecology & Behavior

It digs burrows under sedge roots or in rock crevices on island slopes and lays one white egg, which both parents take turns incubating, returning to the nest around 9 p.m. It feeds on fish, squid, and crustaceans.

🇰🇷 4. Connection to Korea

Chilbaldo and Guguldo Islands in Sinan, its representative colonial breeding sites in Korea, are designated as Natural Monument (Korea) seabird breeding sites. The species itself has no conservation status in the National List of Species of Korea.