Western dwarf squirrel 
Western gorilla 
Western Gray Squirrel 
Western grey kangaroo 
Western hartebeest 
Western hoolock gibbon 
Western lesser bamboo lemur 
Western lowland bongo 
Western lowland gorilla 
Western Mountain Coati 
Western nesomys 
Western red colobus 
Western Roe Deer 
Whiptail wallaby 
White rhinoceros 
White-beaked dolphin 
White-cheeked spider monkey 
White-eared opossum 
White-faced saki 
White-footed mouse 
White-footed sportive lemur 
White-fronted capuchin 
White-fronted spider monkey 
White-headed capuchin