Kingdom: Animalia
Phylum: Chordata
Class: Aves
Subclass: Neornithes
Infraclass: Neognathae
Superorder: Neoaves
Order: Charadriiformes
Family: Laridae
Subfamily: Sterninae
Genus: Sterna
Species: S. albifrons
Subspecies: S. albifrons ssp. sinensislis
Binomial name: Sterna albifrons ssp. sinensislis
Synonym: Sterna sinensis, Sterna minuta, Sternula placens, Sternula inconspicua, Sterna sinensis placens, Sterna sinensis tormenti
Common name: Eastern Little Tern. Little Tern
Sternula albifrons sinensis (Eastern Little Tern) is regular migrant that inhabits the big shallow inlets of northern New Zealand. It is also a casual visitor to other estuarine habitats south to Stewart Island / Rakiura. It breeds in SE Russia to Japan, SE Asia, Philippines, New Guinea and Australia.
The Eastern Little Tern has a body length of 25 cm (bill tip to tail) and is similar in size to NZs fairy Tern (Sternula nereis davisa). It has a black eye-stripe that extends to the base of the yellow bill. It feeds by shallow diving for live fish.
The photo is of the species Sterna albifrons 
Thanks to Wikipedia for text and information http://creativecommons.org/licenses/by-sa/3.0/
