Table 3. List of abbreviated names of song nuclei used in describing the parrot song system by various studies interpreted relative to our study.

Paton et al. 1981	Striedter, 1994	Durand et al. 1997	Jarvis et al. 2000	Reiner et al 2004, Jarvis et al 2005	Present study
HVc	NLc	NLc	NLc	NLC	NLC core
	NLc	NLc	NLc	NLC	NLC shell
RA	AAc	AAcd	AAcd	AAcd	AAC core
	AAc	AAcv*	AAcv*	AAcv	AAC shell
	HVo	HVo	HVo core*	MO core	MO core
			HVo surround*	MO surround	MO shell
MAN	NAo	NAo	NAo core*	NAO core	NAO core
MAN	NAs*	NAom*	NAo surround*	NAO surround	NAO shell

* NAs defined in Striedter [32] is a small portion of what we find as the NAO shell, in which authors said was analogous to songbird LMAN. NAom defined in Durand et al. [34] is another small portion of what we define as NAO shell. NAo core and surround and HVo core and surround in Jarvis et al. [24] was together called the NAo and HVo complex. AAcv in Durand et al. [34] and Jarvis et al. [24] comprised the ventral part of the AAC shell described here.