In Sorceror's Stone, the boa constrictor that Harry was talking to winked at him. However, snakes don't have eyelids, and so this is impossible.
Additionally, it is mentioned that the snake said "thanksss, amigo." And yet the snake also told Harry that he never went to Brazil. So how does he know Portuguese?
By Jadefireeyes

ESTÁS LEYENDO
25 Flaws in Harry Potter
De TodoA collection of [ehem] glaring flaws - plot holes, inconsistencies, and counter-intuitive occurrences not explainable by even magic - in the otherwise splendid Harry Potter books by J. K. Rowling. Co-authored by Jadefireeyes and Frozenpaw. Please co...