κολυμβίς
From LSJ
Ἔοικα γοῦν τούτου γε σμικρῷ τινι αὐτῷ τούτῳ σοφώτερος εἶναι, ὅτι ἃ μὴ οἶδα οὐδὲ οἴομαι εἰδέναι → I seem, then, in just this little thing to be wiser than this man at any rate, that what I do not know I do not think I know either
English (LSJ)
ίδος, ἡ,
A diver, name of a bird, prob. grebe, Podiceps minor, Ar.Av.304, Arist.HA593b17, Alex.Mynd. ap. Ath.9.395d; cf. κολυμβάς 11.1: as Adj., κ. αἴθυιαι Arat.296.
German (Pape)
[Seite 1476] ίδος, ἡ, = κολυμβάς, eine Entenart; Ar. Av. 306, vgl. Ath. IX, 395 d; Arist. H. A. 8, 3.