RESEARCH ARTICLE How conspicuous are peacock eyespots and other colorful feathers in the eyes of mammalian predators? 1 1 1 1 2 Suzanne Amador KaneID *, Yuchao Wang , Rui Fang , Yabin Lu , Roslyn Dakin 1 Physics & Astronomy Department, Haverford College, Haverford, Pennsylvania, United States of America, 2 Migratory Bird Center, Smithsonian Conservation Biology Institute, National Zoological Park, Washington DC, United States of America *
[email protected] a1111111111 a1111111111 a1111111111 a1111111111 Abstract a1111111111 Colorful feathers have long been assumed to be conspicuous to predators, and hence likely to incur costs due to enhanced predation risk. However, many mammals that prey on birds have dichromatic visual systems with only two types of color-sensitive visual receptors, rather than the three and four photoreceptors characteristic of humans and most birds, OPEN ACCESS respectively. Here, we use a combination of multispectral imaging, reflectance spectros- Citation: Kane SA, Wang Y, Fang R, Lu Y, Dakin R copy, color vision modelling and visual texture analysis to compare the visual signals avail- (2019) How conspicuous are peacock eyespots able to conspecifics and to mammalian predators from multicolored feathers from the Indian and other colorful feathers in the eyes of mammalian predators? PLoS ONE 14(4): peacock (Pavo cristatus), as well as red and yellow parrot feathers. We also model the e0210924. https://doi.org/10.1371/journal. effects of distance-dependent blurring due to visual acuity. When viewed by birds against pone.0210924 green vegetation, most of the feathers studied are estimated to have color and brightness Editor: Matthew Shawkey, University of Akron, contrasts similar to values previously found for ripe fruit.