The Norfolk triller (Lalage leucopyga leucopyga ) was a small passerine bird in the cuckooshrike family, Campephagidae. It is the extinct nominate subspecies of the long-tailed triller which was endemic to Norfolk Island, an Australian territory in the Tasman Sea between Australia and New Zealand. Little is known of its biology.
The Norfolk triller was similar to other subspecies of the long-tailed triller, though it was slightly larger and had a richer buff wash on the underparts and rump and a broader white tip to the outer rectrices.
Breeding was recorded in September, with eggs in December and February. Nests were shallow and cup-shaped, made of lichen, moss and fibrous roots, and lined with finer material. The clutch was usually two eggs.