Large Frogmouth

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Image:LargeFrogmouth.jpg

Common Name: Large Frogmouth
Scientific Name: Batrachostomus auritus

Size: 15.7-16.9 inches (40-43 cm); Wingspan: 33-35.8 inches (84-91 cm)

Habitat: Asia and Oceania; it occurs very sparsely in south peninsular Thailand; Sabah, Sarawak and Peninsular Malaysia; Kalimantan (including the Natuna and Labuan islands) and Sumatra, Indonesia, and Brunei. They do not appear to be migratory.

It is an elusive and poorly known species, that appears to be genuinely rare or uncommon. It occurs in lowland dipterocarp forest to at least 250 m, and maybe as high as 1,000 m.

Status: Near Threatened. Global population: Unknown amount of adult individuals with a decreasing population trend. The forest destruction in the Sundaic lowlands of Indonesia has been extremely rapid (Kalimantan lost nearly 25% of its evergreen forest during 1985-1997. The situation is little different in Thailand and Malaysia, but its ability to persist in regenerating and secondary growth habitats means that it is probably not suffering more than a moderately rapid decline.

Diet: Mostly nocturnal insects. They also eat worms, slugs and snails; as well as small mammals, reptiles, frogs and small birds. They feed by sallying to catch insects on the ground or from branches.

Nesting: Sexes are similar, although females are duller and plainer than males. Adults are chestnut to light brown above, with pale bars on scapulars. There are white tips to upper wings coverts and lower scapulars. It has a buffy white and blackish-barred nuchal collar (base of the back of the neck) and a uniform warm brown throat and breast with a few white markings. The irises are brown. Juveniles are plainer and duller than adults with no nuchal collar or spotting on the upper parts, scapulars and wing coverts.

Little is known about nesting behavior in this species; two nests were discovered at Taman Negara on peninsular Malaysia and had eggs in February. A nest in Sumatra had a chick in late July. The nest is a flimsy platform of small sticks, usually built on the fork of a horizontal branch, but also in vertical forks, on top of grass trees, at the entrance to a hollow, and on the old nests of other birds. Frogmouths lay 1 to 4 white, oval, slightly glossy eggs, which are incubated for about 30 days. The chicks fledge in 25-35 days.

Cool Facts: This is the largest of the Asian frogmouths, although the Dulit Frogmouth (B. harterti) is not much smaller.

Their territorial call is unmistakable; 4 to 8 loud bubbling trills, ‘prrrrrroh prrrrrroh prrrrrroh prrrrrroh’, either rising or even-pitched each followed by a 3 to 6 second pause.


Found in Songbird ReMix Frogmouths, Nightjars & Goatsuckers

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