Gruesome twosome kukri rippers: Oligodon formosanus (Günther, 1872) and O. fasciolatus (Günther, 1864) eat Kaloula pulchra Gray, 1831 either by eviscerating or swallowing whole

@article{Bringse2021GruesomeTK,
  title={Gruesome twosome kukri rippers: Oligodon formosanus (G{\"u}nther, 1872) and O. fasciolatus (G{\"u}nther, 1864) eat Kaloula pulchra Gray, 1831 either by eviscerating or swallowing whole},
  author={Henrik Brings{\o}e and Maneerat Suthanthangjai and Winai Suthanthangjai and J. F. Lodder and Navapol Komanasin},
  journal={The Journal Herpetozoa},
  year={2021},
  volume={34},
  pages={49-55}
}
Predation on adult microhylid frogs Kaloula pulchra by two closely-related colubrid snakes is described, based on two observations of Oligodon formosanus in Hong Kong and one observation of O. fasciolatus in Thailand. In two instances, O. formosanus was observed cutting open the abdomen of this anuran species. In one case, it performed repeated rotations about its own longitudinal body axis (“death roll”) while its head was inserted into the frog’s abdomen. The purpose of this behaviour was… 

Figures from this paper

Yet another kukri snake piercing an anuran abdomen: Oligodon ocellatus (Morice, 1875) eats Duttaphrynus melanostictus (Schneider, 1799) in Vietnam

It is hypothesised that the behaviour of eviscerating or piercing anurans to eat their organs has been developed in the O. cyclurus species group or clade.

Perils of ingesting harmful prey by advanced snakes.

The advanced snakes (Alethinophidia) include the extant snakes with a highly evolved head morphology providing increased gape and jaw flexibility. Along with other physiological and morphological

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