Figure 4.

Scatterplot of log‐transformed brain volume vs. body mass in parrots. Solid star indicates cockatoos; solid dots indicate Macaws and allies; and inverted solid triangles indicate Amazons and allies, according to Tavares et al. (2006). Aa, Amazona aestiva; Av, Amazona vinacea; Ah, Anodorhynchus hyacinthinus; Ac, Ara chloropterus; As, Ara sp.; Al, Aratinga leucophthalma; Cg, Cacatua galerita; Cp, Cyanoliseus patagonus; Ef, Enicognathus ferrugineus; Mm, Myiopsitta monachus; Nn, Nandayus nenday; Pp, Pionopsitta pileata; Pm, Pionus maximiliani; Pa, Primolius auricollis; Pf, Pyrrhura frontalis.