Checking snake traps. Valerie Cook-Fletcher, senior invasive species biologist for the California Department of Fish and Wildlife, checks traps for the invasive watersnake with Ron Smith and Louanne McMartin, US Fish and Wildlife Service aquatic invasive species biologists.

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Keywords: animal, animals, archive, conservation, conserve, education, fauna, fish, flora, habitat, history, image, learning, management, natural, nature, preservation, preserve, record, reference, refuge, service, states, united, usfws, wildlife, world