Black-crowned Night Heron

Scientific Name: Nycticorax nycticorax
Malay Name: Pucung-Kuak Biasa
Chinese Name: 夜鹭

Range:
Found worldwide except Australia and Antarctica with most northerly populations wintering south

Taxonomy:
Polytypic. Subspecies are: nycticorax, hoactli, obscurus, falklandicus

Local Subspecies: nycticorax

Size: 58-65 cm

Identification: Non-breeding adult has greyish-white overall plumage with contrasting black crown, mantle and scapulars, yellow legs/feet, whitish nape-plumes and mostly blackish bill. Breeding adult has glossed bluish-green mantle/scapulars and reddish legs. Juvenile is duller brown overall with white-spotted upperparts and streaked crown, head-sides and underparts. 

Similar looking species: Striated Heron

Habitat: Marshes, mangroves and waterbodies near parks/gardens.

Behaviour/Ecology: Highly gregarious and mostly seen at dawn and dusk.

Local Status: Uncommon resident

Conservation Status: Least Concern (IUCN 3.1)

Location: Sungei Buloh, Singapore Botanic Gardens, Pasir Ris Park, Lorong Halus, West Coast Park, Jurong Eco Garden, Jurong Lake Park and any suitable patch of habitat.

Photos:

External Links:
Conservation Status: IUCN Red List Page
Photos: Oriental Bird Images
Sound Recordings: xeno-canto Link
Wikipedia Entry: Wikipedia Link

Reference:
Craig Robson (2011) A Field Guide to the Birds of South-East Asia