Zebra stripes through the eyes of their predators, zebras, and humans

Amanda D. Melin, Donald W. Kline, Chihiro Hiramatsu, Tim Caro

    Research output: Contribution to journalArticlepeer-review

    25 Citations (Scopus)

    Abstract

    The century-old idea that stripes make zebras cryptic to large carnivores has never been examined systematically. We evaluated this hypothesis by passing digital images of zebras through species-specific spatial and colour filters to simulate their appearance for the visual systems of zebras' primary predators and zebras themselves. We also measured stripe widths and luminance contrast to estimate the maximum distances from which lions, spotted hyaenas, and zebras can resolve stripes. We found that beyond ca. 50 m (daylight) and 30 m (twilight) zebra stripes are difficult for the estimated visual systems of large carnivores to resolve, but not humans. On moonless nights, stripes are difficult for all species to resolve beyond ca. 9 m. In open treeless habitats where zebras spend most time, zebras are as clearly identified by the lion visual system as are similar-sized ungulates, suggesting that stripes cannot confer crypsis by disrupting the zebra's outline. Stripes confer a minor advantage over solid pelage in masking body shape in woodlands, but the effect is stronger for humans than for predators. Zebras appear to be less able than humans to resolve stripes although they are better than their chief predators. In conclusion, compared to the uniform pelage of other sympatric herbivores it appears highly unlikely that stripes are a form of antipredator camouflage.

    Original languageEnglish
    Article numbere0145679
    JournalPloS one
    Volume11
    Issue number1
    DOIs
    Publication statusPublished - Jan 1 2016

    All Science Journal Classification (ASJC) codes

    • General Biochemistry,Genetics and Molecular Biology
    • General Agricultural and Biological Sciences
    • General

    Fingerprint

    Dive into the research topics of 'Zebra stripes through the eyes of their predators, zebras, and humans'. Together they form a unique fingerprint.

    Cite this