The smallest of the Hawaiian honeycreepers, the ʻanianiau is endemic to Kauaʻi and found primarily within the island’s high-elevation forests. ʻAnianiau are smaller and straighter-billed than the Kauaʻi ʻamakihi. Males are bright yellow in appearance, while females are yellow-green. These small birds move quickly through the forest to feed on nectar, insects, and fruit.