Not "look" curiously, but "chirp" as young birds (Isaiah 8:19; Isaiah 10:14). Necromancers made a faint cry come from the ground as of departed spirits. From the Latin pipio. The same Hebrew is translated "chatter" (Isaiah 38:14).
Bibliography Information Fausset, Andrew Robert M.A., D.D., "Definition for 'Peep' Fausset's Bible Dictionary". bible-history.com - Fausset's; 1878.