Figure 1.

Behavioral training and starling neuroanatomy. a, Schematic diagram of the connectivity of the songbird auditory system across two coronal planes of one hemisphere. b, Schematic of operant apparatus used for behavioral training. c, Mean (±SEM) behavioral performance (d′) during learning for subjects used in CLM experiments (squares) and subjects used in CMM experiments (circles). Error bars are across subjects. d, Distributions of recording locations for CLM neurons (gray bars) and CMM neurons (black outlines). Hp, Hyperpallium; Ov, ovoidalis.