The kioea (Chaetoptila angustipluma) was an endemic Hawaiian bird that became extinct around the mid-19th century.

What distinguished the kioea from other honeyeaters was the broad black stripe on its face, and bristle-like feathers on the head and breast.

The Hawaiian word "kioea" literally means "stand tall", though its relation to the bird's behaviour is unknown.

A 2008 study argued, on the basis of a phylogenetic analysis of DNA from museum specimens, that the genera Moho and Chaetoptila do not belong to the Meliphagidae (and only resemble them due to convergent evolution), but instead belong to a group that includes the waxwings and the palmchat; they appear especially close to the silky-flycatchers.

The cause of its extinction is mostly attributed to logging of its habitat (the Hawaiian tropical rainforests), hunting, and the introduction of predators like feral cats, dogs, and pigs.