2. (noun) reef heron, Egretta sacra - a slaty-grey heron with a long, heavy, grey to yellowish bill. Legs relatively short, yellow-green. Hunched and almost horizontal when feeding. Found in mangrove inlets, rocky shores, wave platforms and intertidal mudflats.
Synonyms: matuku nuia, matuku tai, matuku waitai, tīkāka, mātukutuku, kākatai