The Collaborative International Dictionary of English v.0.48:
Piet \Pi"et\ (p[imac]"[e^]t), n. [Dim. of Pie a magpie: cf. F. piette a smew.] (Zool.) (a) The dipper, or water ouzel. [Scot.] (b) The magpie. [Prov.Eng.] [1913 Webster] Jay piet (Zool.), the European jay. [Prov.Eng.] Sea piet (Zool.), the oyster catcher. [Prov.Eng.] [1913 Webster]