General: 4 inches in length.

Adult Male: Yellow-green above. Bright yellow underneath. Dark, slightly decurved bill with paler base. Pale legs. No dark lores.

Adult Female: Slightly smaller than male and has duller plumage.

Immature: Similar to female.

Native forests above 3000 feet on Kaua'i.

Nesting

2-4 eggs. The eggs have a 14 day incubation period. Fledging occurs in ? days. The nest is a cup made from twigs, moss, leaves, rootlets, and grass fibers. It is usually built in the crown of a non-blooming 'Ohi'a tree.