Parrots are birds of the roughly 393 species in 92 genera that make up the order Psittaciformes, found in most tropical and subtropical regions. The order is subdivided into three superfamilies: the Psittacoidea ("true" parrots), the Cacatuoidea (cockatoos), and the Strigopoidea (New Zealand parrots). The greatest diversity of parrots is in South America and Australasia. Characteristic features of parrots include a strong, curved bill, an upright stance, strong legs, and clawed zygodactyl feet. Many parrots are vividly coloured, and some are multi-coloured. The most important components of most parrots' diets are seeds, nuts, fruit, buds, and other plant material. In the stamps we can see the following parrots: Anodorhynchus hyacinthinus, Pseudeos fuscata, Aratinga jandaya, Trichoglossus haematodus, Platycercus elegans, Ara ararauna, Ara chloropterus.