Concurrent development of the head and pinnae and the acoustical cues to sound location in a precocious species, the chinchilla (Chinchilla lanigera).
Jones HG, Koka K, Thornton JL, Tollin DJ. Concurrent development of the head and pinnae and the acoustical cues to sound location in a precocious species, the chinchilla (Chinchilla lanigera). J Assoc Res Otolaryngol. 2011 Apr; 12(2):127-40.