Bornean Bulbul Rubigula montis Scientific name definitions

17–18 cm. Medium-small, active, conspicuous bulbul with slightly elongated crest feathers (raised when bird excited). Head is dull black, upperparts dull olive; wings and tail browner, with yellow-olive fringing; throat whitish-yellow, merging into bright olive-yellow underparts, yellower on belly and vent (less yellow than P. melanicterus); iris dark red-brown (whitish under lid); bill fairly slender, black; legs dark grey. Sexes alike. Juvenile undescribed, probably duller and browner then adult and with dull iris.

N & C Borneo.

An arboreal frugivore and partial insectivore. Eats fruit of Macaranga (Euphorbiaceae) less than 4 mm in diameter, also Trema orientalis and T. tomentosa (Ulmaceae), Litsea (Lauraceae); berries generally swallowed whole, but one individual seen to squeeze small black seeds from watery flesh of capsules of Homolanthus (Euphorbiaceae). Often perches in open at forest edges. Regularly performs aerial sallies to capture flying insects.

Constantly given sharp “yek, yek”. Song  said to resemble that of P. melanicterus.