Foregut fermentation in the hoatzin, a neotropical leaf-eating bird.

@article{Grajal1989ForegutFI,
  title={Foregut fermentation in the hoatzin, a neotropical leaf-eating bird.},
  author={A Grajal and Stephan Strahl and R. Mart{\'i}n-Gil Parra and M Gloria Dominguez and Albert Neher},
  journal={Science},
  year={1989},
  volume={245 4923},
  pages={1236-8}
}
The only known case of an avian digestive system with active foregut fermentation is reported for the hoatzin (Opisthocomus hoazin), one of the world's few obligate folivorous (leaf-eating) birds. Hoatzins are one of the smallest endotherms with this form of digestion. Foregut fermentation in a flying bird may be explained by increased digestive efficiency by selection of highly fermentable and extremely patchy resources, coupled with microbial nutritional products and secondary compound… CONTINUE READING

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