Uinta chipmunk 
Uinta ground squirrel 
Unstriped Ground Squirrel 
Urial 
Variegated squirrel 
Veldkamp's dwarf epauletted fruit bat 
Venezuelan red howler 
Verreauxs sifaka 
Vervet monkey 
Vicuña 
Visayan warty pig 
Von der Deckens sifaka 
Wahlbergs epauletted fruit bat 
Waigeou Cuscus 
Walia ibex 
Wall-roosting mouse-eared bat 
Wallaroo 
Water buffalo 
Waterbuck 
Webbs tufted-tailed rat 
Weddell seal 
Weddell's Saddle-back Tamarin 
Wedge-capped capuchin 
West Indian manatee