Crested cuckoo-dove
The crested cuckoo-dove ("Reinwardtoena crassirostris") is a species of bird in the family Columbidae. It is endemic to the Solomon Islands archipelago. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest. It is threatened by habitat loss. Taxonomy and systematics. The crested cuckoo-dove was originally described in 1859 as "Turacoena crassirostris" by John Gould on the basis of a specimen from Guadalcanal in the Solomon Islands. It was then moved to the monotypic genus "Coryphoenas" by Robert Wardlaw-Ramsay in 1890. The generic name "Reinwardtoena" is in  honor of the naturalist Caspar Reinwardt, combining his name with the Ancient Greek word "oinas", meaning pigeon. The specific name "crassirostris" is from the Latin words "crassus", meaning thick, and "rostris", meaning billed. Crested cuckoo-dove is the official common name designated by the International Ornithologists' Union. Other common names for the species include crested pigeon, crested cuckoo dove, and crested long-tailed pigeon. The crested cuckoo-dove is one of three species in the genus "Reinwardtoena." It is does not have any subspecies. Description. The crested cuckoo-dove is long. Both sexes are similar in appearance. The upperparts and  the flight feathers on the tail are black, while the breast, underparts, and hindneck is bluish-gray. The throat is white and the head and crest are pale purplish-gray. The feathers on the crown and nape have a hairy texture.The iris is yellow and surrounded by a ring of red orbital skin. The bill is orange-yellow, with a strongly hooked upper mandible, while the legs are red. Juveniles lack the crest, and are duller and duskier. Vocalisations. The advertising call is a far-carrying, whistling "wha...whuaaw...wha...whuaaw", with the first note rising in pitch, and  the second note being drawn-out and slurred. Distribution and habitat. The crested cuckoo-dove is endemic to the Solomon Islands archipelago, being found on the islands of Bougainville, Santa Isabel, Makira, Kolombangara, and Guadalcanal. It inhabits forests and secondary growth on steep hills and in lowlands, usually at elevations of , but sometimes up to . It is thought to be nomadic. Behaviour and ecology. The crested-cuckoo dove occurs either alone or in pairs. It feeds on fruit, such as those from the genera "Osmoxylon" and "Schefflera". It usually forages in trees, but occasionally comes down to the ground to  feed. Eggs are laid in clutches of one. Status. The crested cuckoo-dove is listed as being near threatened by the International Union for Conservation of Nature (IUCN) on the IUCN Red List. Although its population has not been determined, it is believed to be moderately small, and declining due to habitat destruction and hunting. Populations in lowlands are declining faster than those in hilly areas, as the former face higher rates of logging. Recommended conservation actions include assessments of the species' population size, rate of population decline and habitat loss, and protection for areas that it inhabits, along with  awareness programs to reduce hunting.