Julian Hume / Scaled head studies of extinct Hawaiian Geese compared with Nene (Branta sandvicensis) (centre). Clockwise from top left: Giant hawaiian goose (Branta sp), Maui nui moa-nalo (Thambetochen chauliodous)...

Julian Hume / Illustration of extinct birds. Pair of Stumbling moa-nalo (Ptaiochen pau). Behind the birds to the left is the critically endangered Rock pelea (Melicope balloui) in the endangered Remya mauiensis, an...