by William Swainson, Zoological Illustrations — Vol I. Pl… (1820)
“ In young birds the white on the sides is tinged with grey. I am inclined to consider the Grand Toucan à ventre rouge of Vaillant as a mere variety, having the red pectoral bar very broad.In general size it is rather larger than the Brazilian Toucan. Our figure is on the exact scale of four-tenths to an inch. ”
