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American Jaguar: Big Cats, Biogeography, and Human Borders

Added to the endangered species list in 1997, the jaguar has declined in population mainly due to habitat fragmentation created by roads, farms, mines, and most controversially, the border wall. Such human-made barriers prevent free movement of many wild animals for predation and mating, thereby threatening their reproduction, DNA transfer, and overall survival. Author and wildlife biologist David C. Louis examines the jaguar's predicament and highlights the work of field scientists.