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Gorsachius
Malayan night heron (Gorsachius melanolophus)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Pelecaniformes
Family:	Ardeidae
Subfamily:	Ardeinae
Genus:	Gorsachius Bonaparte, 1855
Type species
Nycticorax goisagi Temminck, 1836
Species
4, see text

Gorsachius is a genus of Old World night herons typically found near water in forested regions. These are medium-sized herons which are migratory in the colder parts of their ranges, but otherwise resident. They are the least known, most strictly nocturnal, smallest and overall rarest night herons.

Three of the four species are found in East, South and South-east Asia, while the last species, the white-backed night heron, is found in sub-Saharan Africa. The Japanese and Malayan night herons resemble each other, being relatively short-billed and overall brown with a dark line from the throat to the upper belly. The larger white-eared and white-backed night herons are darker, with distinctive white markings on the face and neck in the former, and an entirely black head in the latter.

Their behavior, especially that of the white-eared night heron, is relatively poorly known compared to that of other night herons, but they nest alone or in small groups, and a clutch of two to five eggs has been recorded. While generally nocturnal and crepuscular, they have been recorded feeding during the day in clouded weather. They are skulking, and known to feed on crabs, crustacean, fish, insects, frogs and other small animals.

Taxonomy

These night herons were formerly placed in the genus Nycticorax, but today all major authorities recognize them as separate. In addition to the species listed below, the rufous or nankeen night heron has been placed in Gorsachius, but today all major authorities place it in Nycticorax. The four night herons in this genus are all monotypic. The white-backed night heron from sub-Saharan Africa and the white-eared night heron from China and Vietnam were previously placed in this genus, while they are now place in two monotypic genera.

Genus Gorsachius – Bonaparte, 1855 – two species

Common name	Scientific name and subspecies	Range	Size and ecology	IUCN status and estimated population
Japanese night heron	Gorsachius goisagi (Temminck, 1836)	Korea, Russia, Japan, the Philippines and Indonesia.	Size: Habitat: Diet:	VU
Malayan night heron	Gorsachius melanolophus (Raffles, 1822)	India, Sri Lanka, Brunei, Nepal, Bangladesh, Myanmar, Cambodia, Laos, Vietnam, Thailand, Malaysia, Singapore, China, Indonesia, the Philippines, Taiwan and Japan.	Size: Habitat: Diet:	LC

References

1. "Ardeidae". aviansystematics.org. The Trust for Avian Systematics. Retrieved 2023-07-27.
2. International Ornithologists' Union. Gill, Frank; Donsker, David; Rasmussen, Pamela (eds.). "IOC World Bird List 14.1" (xlsx). Retrieved 2023-12-20.

• Martínez-Vilalta, A., & A. Motis (1992). Family Ardeidae (Herons). pp. 376–429 in: del Hoyo, J., A. Elliott, & J. Sargatal. eds (1992). Handbook of the Birds of the World. Vol. 1. Ostrich to Ducks. Lynx Edicions, Barcelona. ISBN 84-87334-10-5

v t e Genera of ibis, herons, pelicans and their extinct allies
Kingdom: Animalia Phylum: Chordata Class: Aves Clade: Aequornithes Order: Pelecaniformes
Pelecaniformes incertae sedis †Cladornis? †Torotigidae? Torotix Pelecani Balaenicipitidae Balaeniceps †Goliathia †Paludiavis Pelecanidae †Eopelecanus †Miopelecanus Pelecanus Scopidae Scopus Ardei See below ↓
Ardei incertae sedis †Ardeacites? †Xenerodiopidae Xenerodiops Threskiornithidae incertae sedis †Gerandibis †Milnea †Mopsitta? †Protibis †Rhynchaeites †Vadaravis †Xenicibis Plataleinae Platalea Threskiornithinae †Apteribis Bostrychia Cercibis Eudocimus Geronticus Lophotibis Mesembrinibis Nipponia Phimosus Plegadis Pseudibis Thaumatibis Theristicus Threskiornis Ardeidae †Ardeagrandis Calherodius †Eoceornis †Matuku †Nyctisoma Oroanassa †Proardeola Agamiinae Agamia Ardeinae Ardea Ardeola Butorides Egretta Gorsachius Nycticorax Nyctanassa Pilherodius †Proardea Syrigma †Zeltornis Zonerodius Botaurinae Botaurus Ixobrychus †Pikaihao Zebrilus Cochleariinae Cochlearius Tigriornithinae †Taphophoyx Tigriornis Tigrisoma

• Gorsachius
• Bird genera
• Taxa named by Charles Lucien Bonaparte