Procelsterna cerulea (Bennett, 1840) The blue noddy or hinaokū or manuohina[2] (Anous ceruleus) is a seabird in the family Laridae.

Its natural habitat is open, shallow seas in tropical and subtropical regions.

The first formal description of the blue noddy was by Frederick Debell Bennett in 1840 under the binomial name Sterna cerulea.

The authors proposed that the noddies should be merged into a single genus Anous and that Procelsterna should be considered as a junior synonym.

[6][7] There are five subspecies:[8] The grey noddy (Anous albivitta) replaces it to the south of its range; the two were formerly considered to be a single species but are now often split.