Sourceswww.linternaute.com/dictionnaire/fr/definition/oie-blanche/ 
www.costarica-nature.org/FRANCAIS/infos_generales_Costa_Rica/Fiches_Infos/paresseux/paresseux.htm 
. 
fr.wikipedia.org/wiki/Porc-%C3%A9pic 
www.wat.tv/video/chardonneret-elegant-kfp1_2gigh_.html 
fr.wikipedia.org/wiki/Dian_Fossey 
fr.wikipedia.org/wiki/Birut%C4%97_Galdikas 
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115 joués - 21 jours
421 joués - 7 mois
9 542 joués - 9 mois
344 joués - 12 mois
9 018 joués - 1 an
466 joués - 1 an
36 joués - 1 an
330 joués - 1 an
225 joués - 1 an
1 310 joués - 1 an
500 joués - 1 an
187 joués - 2 ans
65 joués - 2 ans
220 joués - 2 ans
169 joués - 2 ans