Fig. 2.

Standardized response strength in dorso-caudal NCM as a function of age and song type. Standardized response strength in each age group averaged over 20 iterations of each song stimulus [TUT; reversed tutor song (revTUT); reverse-order tutor song (roTUT); unfamCON; familiar conspecific song (famCON)]. famCON for juvenile birds were from birds in the breeding aviary in which they were housed up until they were tested; adult birds were removed from their breeding aviary at least 1 mo prior to being tested, and thus there was no comparable famCON song for adults. All values are means + SE.