Hawaiian Coot

fulica alai

The Hawaiian Coot, locally known as the 'alae ke'oke'o, is a fascinating waterbird endemic to the Hawaiian Islands. Often seen bobbing its head as it swims across freshwater ponds and coastal marshes, this resilient species is a key member of Hawaii's native wetland ecosystems. Although it resembles its mainland relative, the American Coot, the Hawaiian Coot is a distinct species with unique behaviors adapted to its isolated island home. These birds are highly opportunistic and incredibly territorial, especially during the nesting season when they will aggressively defend their territory from other waterbirds. Observing them is a treat for birdwatchers, as they exhibit lively social dynamics, splashing, calling, and skittering across the water's surface to establish dominance. Their presence serves as an important indicator of wetland health in Hawaii.

生息地: Found in coastal wetlands, freshwater marshes, taro patches, and open ponds across the Hawaiian Islands.

外見

The Hawaiian Coot is a medium-sized waterbird characterized by its dark slate-grey to charcoal body, which contrasts sharply with its bright white bill and large, prominent white frontal shield on its forehead. Some individuals may display a faint reddish spot at the top of the frontal shield. They have short, white undertail coverts that are highly visible when they swim or tilt forward. Instead of webbed feet, they possess large, lobed toes colored pale greenish-grey, which aid in both swimming and walking over soft mud. Adults typically measure 33 to 41 centimeters in length with a compact, oval body.

界Animalia門Chordata綱Aves目Gruiformes科Rallidae属Fulica

Hawaiian Coot

カテゴリ

鳥類

レア度

Common

危険度

1/5 · 非常に低い

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おもしろい事実

In Hawaiian mythology, the 'alae coot was believed to hold the secret of fire, which it reluctantly shared with the demigod Maui, resulting in the white mark on its forehead.

They are known to build floating nests out of aquatic vegetation, which can rise and fall with changing water levels to prevent flooding of their eggs.

Unlike ducks, Hawaiian Coots do not have webbed feet; instead, they have large, leaf-like lobes on their toes that help them swim and walk on mud.

特殊能力

Large, independent lobes on their toes fold back as the foot is pulled through the water and open to provide propulsion on the downstroke, allowing efficient swimming.

Despite appearing clumsy on takeoff, they are capable of strong, sustained flight, allowing them to migrate between islands to seek out newly created wetlands.

They utilize aggressive pattering runs across the water surface, flapping their wings and splashing loudly to deter rivals and defend their nesting sites.

サイズと詳細

長さ: 33-41 cm
翼開長: 58-68 cm
体重: 0.5-0.9 kg
寿命: 5-10 年
Top Speed: 40 km/h
一度の産卵数: 4-10
抱卵期間: 23-26 日
渡りの距離: 150 km

食性と食事

The Hawaiian Coot is an opportunistic feeder that consumes a mix of aquatic plants, seeds, and small invertebrates found in the water or mud.

年齢による違い: Chicks are initially fed a higher proportion of protein-rich insects and small invertebrates by their parents before transitioning to the standard omnivorous adult diet.