Bismarck Honeyeater

Medium-sized spiderhunter with an olive back and streaked gray underparts. Inhabits lowland and submontane forests and forest edges, where it feeds primarily on nectar in the understory; favors blossoms of banana and ginger. Very similar in appearance to Gray-breasted Spiderhunter; range overlap is poorly understood but appears to be minimal. Look for Bornean’s more intensely streaked underparts and slightly larger size. Long-billed Spiderhunter can show some streaking on the breast but is much larger and longer-billed, with yellowish underparts. Sometimes noisy, giving loud raspy nasal calls.

Small, bright yellowish leaf warbler with a black-striped head. Entirely yellow underparts and tail distinguish this species from Yellow-vented Warbler and White-tailed Leaf Warbler. Sulphur-breasted Warbler is extremely similar, but Limestone averages incrementally longer-billed and paler yellow on the underparts. Specialist of lowland and mid-altitude karst hill forest. Like other leaf warblers, forages actively in foliage, often in flocks. Song is a subtly descending series of high tinkling notes; Sulphur-breasted’s song is snappier-sounding, with a distinctly ascending quality. Call is a two-note exclamation with a quiet first half: “bi-DEW!”

A massive arboreal bushshrike of lowland forests. Shaped like a typical bushshrike but oversized, with a giant bill. Throat and breast are orange-red, fading to yellow under the tail. Head is gray with two giant white spectacles around the eyes. The back, wings, and tail are yellow-green with dark spots at the tips of the secondary flight feathers and tail. Locally overlaps with Lagden’s Bushshrike and possibly with Green-breasted Bushshrike and Monteiro’s Bushshrike, but Fiery-breasted is unique in its combination of orange-red breast and bright white spectacles. Gives a series of short, ringing hoots, “kwhop, kwhop,” sometimes spaced out by several seconds.