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  • All fields: Philadelphia Zoo
(3 results)



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    • Wyoming toads and cattle: at home on the range

    • Aquatic animals; Biologists (USFWS); Extinctions; Endangered species; Amphibians;
    • Biologists feared that the Wyoming toad was extinct until 1987 when a fisherman discovered a population at Mortenson Lake on Swanson’s land. The discovery created excitement about a chance to save the species and its habitat, and it led Swanson...
    • Tiger, Siberian

    • Endangered species; Mammals; carnivore; cat; Philadelphia Zoo; Pennsylvania; captive; Predators; wildlife; animals;
    • August 1993

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