Scientific Name: Hydrobates monorhis
Malay Name: Lelayang-Laut Kelam Asia
Chinese Name: 黑叉尾海燕
Breeds on the offshore islands of temperate Northeast Pacific from eastern China to Korea and Japan, passaging through the South China Sea to the Indian Ocean to winter.
Size: 20 cm
Identification: Small size, forked tail and overall sooty brown plumage with contrasting paler diagonal bar across upperwing-coverts.
Habitat: Open seas.
Behaviour/Ecology: Usually observed in small groups during migration, flying and gliding just above the water surface.
Local Status: Common passage migrant
Conservation Status: Near Threatened (IUCN 3.1)
Location: Straits of Singapore.
Craig Robson (2011) A Field Guide to the Birds of South-East Asia
Allen Jeyarajasingam & Alan Pearson (2012) A Field Guide to the Birds of Peninsular Malaysia and Singapore