roland knapp

  • Roland Knapp works to recover frog population in the Sierras
    Roland Knapp works to recover frog population in the Sierras

    Biologist Roland Knapp and colleagues work to restore a once-vanishing frog population in the Sierras

  • UCSB biologist Roland Knapp and colleagues detail the remarkable recovery of an endangered frog species in Yosemite

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