Here is some information on birds (and serpents...as Alan suggested earlier these tend to operate together in many mythologies). There is no mention of kakatau in these descriptions, though some birds are mentioned by their given name rather than species. According to other sources i have read Magaul (Manaul), one of the most important birds to Moro mythology, was supposedly a Sarimanok.
https://www.aswangproject.com/role-b...ine-mythology/