Viper
The female viper conceives by taking the male's head in her mouth. She then bites off his head and he dies.
The image was obtained from the source listed below.
Museum Meermanno - MMW, 10 B 25 - Facsimile
Manuscript
Museum Meermanno, MMW, 10 B 25, folio 40r
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Possible copyright holder: Museum Meermanno
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Museum Meermanno - MMW, 10 B 25 - Facsimile