Rødknapphokko, Crax globulosa Belgianchocolate via Flickr, Creative Commons Attribution.

Storhokko, Crax rubra "Crax rubra (Great Curassow)" by Brian.gratwicke via Flickr, Creative Commons Attribution.

Detaljert systematikk:

U.art Crax alector alector (Legg til)
U.art Crax alector erythrognatha (Legg til)

U.art Crax fasciolata fasciolata (Legg til)
U.art Crax fasciolata grayi (Legg til)
U.art Crax fasciolata pinima (Legg til)
U.art Crax fasciolata xavieri (Legg til)

Rødknapphokko, Crax globulosa

Storhokko, Crax rubra

U.art Crax rubra griscomi (Legg til)
U.art Crax rubra rubra (Legg til)