What Small native cat to North and South America did Carl B. Koford make studies on in the 50's and 70's?
Jaguarundi The jaguarundi ("Puma yagouaroundi") ( ) or eyra cat is a small wild cat native to southern North America and South America. It has been listed as Least Concern on the IUCN Red List since 2002. Its presence in Uruguay is uncertain. The megareserves of the Amazon Basin are probably the only conservation units that can sustain long-term viable populations.
Gray fox The gray fox ("Urocyon cinereoargenteus"), or grey fox, is a carnivorous mammal of the family Canidae ranging throughout most of the southern half of North America from southern Canada to the northern part of South America (Venezuela and Colombia). No other canid's natural range spans both North and South America and it is the only American canid that can climb trees. This species and its only congener, the diminutive Channel Island fox ("Urocyon littoralis"), are the only living members of the genus "Urocyon", which is considered to be the most basal of the living canids. Though it was once the most common fox in the eastern United States, and still is found there, human advancement and deforestation allowed the red fox to become more dominant. The Pacific States still have the gray fox as a dominant. Its specific epithet "cinereoargenteus" means "ashen silver".