Horsfield's Frogmouth vs Bornean Frogmouth
Batrachostomus javensis 比較対象 Batrachostomus mixtus
Side-by-Side Comparison
| 属性 | Horsfield's Frogmouth | Bornean Frogmouth |
|---|---|---|
| 学名 | Batrachostomus javensis | Batrachostomus mixtus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Podargidae | Podargidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 22.2 cm (8.7 in) | 23.6 cm (9.3 in) |
| 体重 | 46.333333333333336 g (1.63 oz) | 46.3 g (1.63 oz) |
| 食性 | Feeds nocturnally on large beetles, millipedes, and worms; occasionally takes small lizards by ground-pouncing. | Nocturnal perch-and-pounce predator feeding on large invertebrates, small frogs, and lizards on the forest floor. |
| 一腹卵数 | 1-2 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Horsfield's Frogmouth
Melodic 'choo-choo-choo' or plaintive whistle; repeated soft notes; calls from Javan and Philippine forest at night; pitch moderate; pairs often answer each other
Bornean Frogmouth
Soft melodic hooting; 'too-too' whistle from Bornean hill forest; gentle and ventriloquial; calls at night from dense undergrowth; alarm a soft hissing exhalation
Geographic Range & Migration
Horsfield's Frogmouth
Found from the Thai-Malay Peninsula through Sumatra, Java, and Borneo to the Philippines. Resident in lowland and hill forest below 1,000 m.
Bornean Frogmouth
Endemic to the highlands of Borneo at 900–2,400 m. Found in montane forest on Mount Kinabalu and adjacent ranges. Rare.
保全状況
Horsfield's Frogmouth
Bornean Frogmouth
How to Tell Them Apart
Horsfield's Frogmouth
Males grey-brown with black freckling and white scapular spots; females warm tawny-rufous with bold white-spotted wing coverts; smallest of the Southeast Asian frogmouths; Javan endemic with finely patterned cryptic plumage.
Bornean Frogmouth
Males grey-brown finely vermiculated dark; white scapular spots; females rufous-chestnut with white-buff spotting; small Borneo endemic closely resembling Sumatran Frogmouth but greyer with less contrast between crown and back.
About These Birds
Horsfield's Frogmouth
マレー半島・スマトラ・ジャワ・ボルネオの低地と山麓の林に生息する中型のガマグチヨタカ（21〜25cm）。赤褐色の胸帯を持つ暗褐色の羽毛。密な林下生えの夜行性昆虫食者。特徴的な口笛のような鳴き声で発見されることが多い。
Bornean Frogmouth
ボルネオの山地固有の中型のガマグチヨタカ（23〜25cm）。暗褐色の羽毛を持つ。山地苔むした林の夜行性昆虫食者。ホースフィールドガマグチヨタカから最近分離独立。生態データが限られており、標高600m以上に限定される。