ArticleProceedings. Biological sciences2022
Diet, habitat and flight characteristics correlate with intestine length in birds.
Article in Proceedings. Biological sciences, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Amphibian Intestine Allometry.Journal of morphology · 2026Article
- Feeding Preferences, Carcass Characteristics, and Plasma and Pectoral Muscle Biochemical Indicators in Racer and Shiqi Pigeons.The journal of poultry science · 2026Article
- A quantitative risk assessment framework for mortality due to macroplastic ingestion in seabirds, marine mammals, and sea turtles.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Host Diet Preference Drives Diversity and Composition of Gut Microbiota in Captive Birds.Ecology and evolution · 2025Article
- Comparative Analysis of Gastrointestinal Morphology and Enteric Nervous System Organization in Mallard, Tufted Duck, and Green-Winged Teal.Animals : an open access journal from MDPI · 2025Article
- Anatomical description of neornithine stomach with implications on neornithine stomach morphology.Journal of anatomy · 2024Article
- Diet and habitat as determinants of intestine length in fishes.Reviews in fish biology and fisheries · 2024Article
- Diet, habitat and flight characteristics correlate with intestine length in birds.Proceedings. Biological sciences · 2022Article
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Authors and funding
7 authors.
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Abstract
A link between diet and avian intestinal anatomy is generally assumed. We collated the length of intestinal sections and body mass of 390 bird species and tested relationships with diet, climate and locomotion. There was a strong phylogenetic signal in all datasets. The total and small intestine scaled more-than-geometrically (95%CI of the scaling exponent > 0.33). The traditional dietary classification (faunivore, omnivore and herbivore) had no significant effect on total intestine (TI) length. Significant dietary proxies included %folivory, %frugi-nectarivory and categories (frugi-nectarivory, granivory, folivory, omnivory, insectivory and vertivory). Individual intestinal sections were affected by different dietary proxies. The best model indicates that higher consumption of fruit and nectar, drier habitats, and a high degree of flightedness are linked to shorter TI length. Notably, the length of the avian intestine depends on other biological factors as much as on diet. Given the weak dietary signal in our datasets, the diet intestinal length relationships lend themselves to narratives of flexibility (morphology is not destiny) rather than of distinct adaptations that facilitate using one character (intestine length) as proxy for another (diet). Birds have TIs of about 85% that of similar-sized mammals, corroborating systematic differences in intestinal macroanatomy between vertebrate clades.
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