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Chytrid fungus has swept through Kings Canyon National Park with a vengance. This is one of the last southern moutain yellow-legged frogs (Rana muscosa) in the area. The disease first appeared in this High Sierra basin in 2004, and has virtually wiped out the last stronghold metapopulations of this species. “Worldwide, this is the worst case of a disease causing extinctions in recorded history, and we’re seeing the results of it right here,” said Vance Vredenburg, an amphibian ecologist who has studied the basin for 13 years. (IUCN: EN, US: EN)

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A live male harlequin frog (Atelopus sp.) in amplexus with a female, dead from chytrid fungus, near Limon, Ecuador. The male died a few days later of the same disease. This species is critically endangered and headed toward extinction due to habitat loss and disease, including chytrid fungus.

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A rare male Atelopus frog is swabbed for chytrid fungus by a scientist near Limon, Ecuador.

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In King’s Canyon National Park, California, chytrid fungus has swept through with a vengeance. Shown are some of the last southern moutain yellow-legged frogs (Rana muscosa) as they lay dead from the fungus. The disease first appeared in this High Sierra basin in 2004, and has virtually wiped out the last stronghold metapopulations of this species. Where once tens of thousands lived, now fewer than 100 remain. “Worldwide, this is the worst case of a disease causing extinctions in recorded history, and we’re seeing the results of it right here,” said Vance Vredenburg, an amphibian ecologist who has studied the basin for 13 years.

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Early work by Joel Sartore. A mine worker is treated for job-related illnesses.

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Biologists band black brandt and check for avian flu on Alaska’s North Slope.

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White-fronted geese under go capture and leg banding by biologists on the western part of the Slope near Teshukpuk Lake. The on going study has surveyed the population, age and health of several goose species for decades in hope of better managing the flocks.

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White-fronted geese under go capture and leg banding by biologists on the western part of the Slope near Teshukpuk Lake. The on going study has surveyed the population, age and health of several goose species for decades in hope of better managing the flocks.

Photo: Julie Jensen Director of Marketing | WVC O: 866.800.7326 | D: 702.443.9249 | E: j.jensen@wvc.org

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