Translation:The little green owl learns French.
Here's what Wikipédia's page on 'Hibou' says (can't promise the quality of the translation):
The word 'hibou' is a very general term of the current vocabulary which, in French, does not correspond to a level of scientific classification. It is a vernacular name whose meaning is ambiguous in biology because it is used only to designate a part of the different species of birds of prey classified in the Strigidae family . This family includes both 'hiboux' and 'chouettes', divided into different genera, the 'hibou' being distinguished from the 'chouette' by the mere presence of crests on the head.