Jak bobo ba nuh, muallifi kitobhoi zijode dar borai rang ba kudakon xonda bud. u ba onho guftahoi saxsonero joft. Ast, dar sakli xele badei va rangi dar in dunjo, ki rasmhoi karikaturai na tanho mumkin ast nison nest. Muallif xudas pursid: In ci dar in cahon doroi ranghoi ibtidoi kofi baroi ta'lim tiflonro? Pas, u Histoire Naturelle des Perroquets az conibi Francois Levaillant kasf. Tasvirhoi, tahti rohbarii professor bouquet, professori rassomi ofaridaast, Prytanee Pariz dar avvali solhoi 1800, sukufoii budand. u mijona komil baroi ta'lim nomhoi rang ba kudakon dar hama co jofta bud."