AT A GLANCE
- Common Name: Common Moorhen
- Scientific Name: Gallinula chloropus
- Category: Birds
- Subcategory: Gruiformes
- Range: Widespread across the Old World, including Europe, sub-Saharan Africa, the Middle East, Central and South Asia, and Southeast Asia
- Habitat Type: Vegetated freshwater ponds, slow-moving rivers, canals, marshes, reedbeds, urban park lakes, and flooded ditches with rich emergent marginal plants
- IUCN Red List Status: Least Concern
- Lifespan: 5 to 11 years (up to 19 years in ringing records)
- Diet: Omnivorous (aquatic plants, waterweeds, seeds, berries, water snails, small fish, worms, aquatic insects, and bird eggs)
- Average Size/Weight: Length 32 to 35 cm; wingspan 50 to 55 cm; weight 260 to 420 g
- Key Defining Feature: Plump slate-black wetland rail with bright green legs, large unwebbed lobed toes, a flashing white flank stripe, and a vivid scarlet frontal head shield and yellow-tipped red bill
Overview
The Common Moorhen (Gallinula chloropus), also widely known as the Waterhen or Swamp Chicken, is one of the most familiar, adaptable, and widespread aquatic birds across Europe, Africa, and Asia. Belonging to the rail family Rallidae, this dark, chicken-sized waterbird is a fixture of reed-fringed village ponds, urban canals, and natural marshlands. Easily recognized by its comical swimming bob and flamboyant scarlet frontal shield, it walks lightly across floating water lilies and muddy shores with extraordinarily long, unwebbed toes.
Biology and Physical Characteristics
Gallinula chloropus has a rounded, compact silhouette with short rounded wings and a short tail that it constantly cocks upward to flash twin white undertail patches. Its plumage is a rich charcoal-grey to brownish-black on the mantle and wings, offset by a clean, broken white stripe along each flank. Its legs and long feet are bright apple-green, adorned with an orange-red ‘garter’ ring above the ankle joint. Although its toes lack swimming webs, they are extraordinarily long and slightly lobed, distributing the bird’s weight so efficiently that it can walk across floating pondweeds and lily pads without sinking. The bill is bright yellow at the tip, transitioning into an intense, fiery-crimson base that extends onto the forehead as a fleshy frontal shield.
Behavior and Ecology
When swimming, the Common Moorhen exhibits a rhythmic, jerky head-pumping motion in synchrony with its paddling feet. When startled, it does not easily take flight; instead, it runs frantically across the water surface with churning wings, seeking shelter inside dense reedbeds. Highly territorial, pairs defend their nesting territories with loud, harsh croaks, sharp ‘kittick’ calls, and aggressive water fights where rivals kick at each other with their long green feet. They build bulky, cup-shaped nests of dead reeds woven among emergent vegetation, where older offspring from early-season broods frequently assist their parents in feeding and brooding younger chicks.
Conservation and Human Impact
The Common Moorhen is classified as Least Concern on the IUCN Red List. Its global population is vast, stable, and highly prosperous. Exceptionally tolerant of human activity, it thrives in heavily modified urban parks, municipal water treatment ponds, agricultural canals, and golf course water hazards throughout its vast range.
Interesting Factoid
The Common Moorhen can walk effortlessly across floating water lily pads and flimsy pond scum without sinking because its bright green toes are almost as long as its entire body, spreading its weight like snowshoes.