Nick Hawkins / Northern leopard frog (Lithobates pipiens) photographed on white. New Brunswick, Canada. August 2013.
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Paul D Stewart / Illustration of Peeping frog - now commonly called Northern Leopard frog (Rana pipiens) plate by Hill. From George Shaw 'General Zoology or Systematic Natural History 1802.
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Jim Brandenburg / Northern Leopard Frog (Rana pipiens) camouflaged in lichen, Minnesota
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Chris Mattison / Northern leopard frog (Lithobates pipiens) North America.
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Chris Mattison / Northern leopard frog (Lithobates pipiens) North America.
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John Cancalosi / Leopard frog (Lithobates pipiens) with eyes above water, New York, USA, September.
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John Cancalosi / Leopard frog (Lithobates pipiens) portrait, New York, USA, September.
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Lynn M Stone / Northern Leopard Frog (Lithobates pipiens) in pond amongst White Water-Lily pads, Connecticut, USA, August. Non exclusive.
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John Cancalosi / Leopard frog (Lithobates pipienss) in pond, New York, USA, August.
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John Cancalosi / Leopard frog (Lithobates pipiens) in pond, New York, USA, August.
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John Cancalosi / Leopard frog (Lithobates pipiens) in pondweed, New York, USA, August.
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John Cancalosi / Leopard frog (Lithobates pipiens) covered in pond weed, New York, USA, August.
