Jamieson, Fausset and Brown on Isaiah 16:2

2. cast out of ... nest--rather, "as a brood cast out" (in apposition with "a wandering bird," or rather, wandering birds), namely, a brood just fledged and expelled from the nest in which they were hatched [Horsley]. Compare Is 10:14; De 32:11.

daughters of Moab--that is, the inhabitants of Moab. So 2Ki 19:21; Psa 48:11; Jr 46:11; La 4:22 [Maurer].

at the fords--trying to cross the boundary river of Moab, in order to escape out of the land. Ewald and Maurer make "fords" a poetical expression for "the dwellers on Arnon," answering to the parallel clause of the same sense, "daughters of Moab."