The Curl-crested Aracari (Pteroglossus beauharnaesii), also known as the Curly-crested Aracari, is a species of bird in the Ramphastidae family, the Toucans. On account of its relatively long tail and curly crest (the latter only visible up close), it was formerly placed in the monotypic genus Beauharnaisius. It is found in Amazonian Peru, Bolivia and Brazil south of the Amazon River. Its natural habitat is tropical moist lowland forests. It is primarily a frugivore, but will also take nestling of birds such as the Yellow-rumped Cacique.
The Curl-crested Aracari is found in the southwestern section of the Amazon Basin, with the Amazon River being its northern range limit. Near the Amazon River, its range extends east to about the Madeira River, while it in the southern half of its range extends east to around the Xingu River. It is overall rare to uncommon, but regularly seen at several localities, including the Tambopata-Candamo reserve in Peru, the Noel Kempff Mercado National Park in Bolivia, and the Cristalino State Park near Alta Floresta in Brazil. Due to its extensive range, it is considered to be of least concern by BirdLife International and consequently the IUCN.