🪐 View in 3D Galaxy 📏 View on 3D Scale Stage

🧬 Biological Classification (Kingdom to Species)Circus cyaneus

Kingdom

Animalia

Phylum

Chordata

Class

Aves

Order

Accipitriformes

Family

Accipitridae

Genus

Circus

Species

Circus cyaneus

Aves🥩 Carnivore

Hen Harrier

Circus cyaneus (Hen Harrier · ハイイロチュウヒ)

🛡️ Conservation Status (IUCN Red List)LC (Least Concern)

DDData Deficient

LCLeast Concern

NTNear Threatened

VUVulnerable

ENEndangered

CRCritically End.

EWExtinct in Wild

EXExtinct

🇰🇷 Class II endangered wildlife (Korea) · Natural Monument (Korea) «Hen Harrier»

Geological Era

Extant

Diet

Carnivore

Length · Height

43~50cm · No data (Wingspan 1m)

Mass · Top Speed

290~600g · No data

Habitat & Fossil Locality

Open country such as fields, grasslands, wetlands, farmlands, and reedbeds

💡 Everyday Comparisons for Size, Mass & Speed

💡 It is a bird that mainly preys on voles in rice paddies, fields, and meadows.
💡 Its maximum body length of 50 cm is about 1.7 times the long side of an A4 sheet of paper (29.7 cm) (Comparison).
💡 Its maximum wingspan of 1.21 m is longer than a 1 m ruler (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)30

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

#잿빛개구리매#Circus cyaneus

📖 1. Overview

The hen harrier is a medium-sized bird of prey that hunts by flying low over open fields and wetlands of the Northern Hemisphere.

🦴 2. Anatomy & Morphology

Feathers form a facial disc that funnels sound to its ears to locate prey, and in flight it holds its wings in a shallow V and shows a white rump patch. Males are pale grey and females are brown.

🔍 3. Ecology & Behavior

It feeds mostly on small mammals such as voles while also catching snakes, frogs, and small birds, and builds its nest on the ground where it lays 3–5 eggs. It flies low before dropping down to seize prey.

🇰🇷 4. Connection to Korea

In Korea, it is a winter visitor found around wetlands and farmlands, designated as Class II endangered wildlife (Korea) and, on November 16, 1982 (1982-11-16), as a Natural Monument (Korea).