I'm going to go with zero. However as I love the outdoors hunt, fish and everything else I am sure we have brought more species to the edge. Cities, houses and farm fields are not a diverse ecosystem.

Complete guess
. B.

If the question is strict in date of 2015 the answer is 0 but if not, my answer based on quick search for clues is:
2- Western Black Rhinoceros The western black rhinoceros (Diceros bicornis longipes) or West African black rhinoceros was a subspecies of the black rhinoceros, declared extinct by the IUCN in 2011.[1][2] They were believed to have been genetically different from other rhino subspecies.[3] It was once widespread in the savanna of sub-Saharan Africa, but its numbers declined due to poaching. The western black rhinoceros resided primarily in Cameroon, but recent surveys have failed to locate any individuals

Eastern Cougar The eastern subspecies was deemed extinct by a U.S. Fish and Wildlife Service (FWS) evaluation in 2011, while a parallel Canadian organization has taken no position on the question.

Good idea @A MyMSTeam Member remind everyone
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