The Fatu Hiva monarch (Pomarea whitneyi) is a large flycatcher in the family Monarchidae.

Adults are a glossy purplish-black with plush-like feathers on their foreheads and grow to around 7 ½ inches.

The Fatu Hiva monarch is assessed as critically endangered, following a decline in excess of 90% over 21 years (three generations).

Recent predator control has happened on Fatu Hiva, though it reduced the rate of territory loss from 60% in 2007–2009 to 30% in 2009–2011.

In July 2023 the Ornithological Society of Polynesia announced a joint program with Auckland Zoo to save the species from extinction.