According to Salonen 1973 120, possibly ‘flamingo’.
goes back to Sum. abzu (PSD A₂ 184)
is a West Semitism from a lexical list
Probably related with a meaning shift and metathesis. The phonetic shape of the Akk. term and its meaning have been convincingly established in a special study Civil 1984a (contrast ‘a bird’ in CAD I 177, ‘Taube’ in AHw. 67; note that the translation ‘bat’ is present in some earlier studies such as Landsberger 1934 97, Biggs 1967 25).