I can sit on the porch and yell "wack, wack, wack" and get the ducks laughing. Have no idea what I'm saying, but they seem highly amused!
They're making fun of your weird accent!
The only one I would suspect being a drake is the "odd duck". But if it is QUACKING and not going "reep reep....reep reep....reep reep" you DO have all girls.