pelophylax lessonae

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Green Frogs Mating & Frog Dissection

Above, a female green frog (Pelophylax lessonae) is shown with a male on her back fertilizing her eggs. Below, a female green frog (Pelophylax kl. esculentus) with egg masses is shown in dissection above a view of the frog’s skeleton. These are two of the hand-colored engraved images from German artist-turned-naturalist August Johann Rösel von Rosenhof in his book Historia naturalis ranarum nostratium…(Natural history of the native frogs…). Published in 1758, it was the first scientifically accurate book on frogs, based on first-hand observation. 

See these illustrations in the exhibition Natural Histories: 400 Years of Scientific Illustration from the Museum’s Library, closing September 13!