@article{oai:tsukuba.repo.nii.ac.jp:00028040,
 author = {長谷川, 克 and 渡辺, 守 and Hasegawa, Masaru and Arai, Emi and Watanabe, Mamoru and Nakamura, Masahiko},
 issue = {2},
 journal = {Ornithological science},
 month = {Dec},
 note = {The maintenance of multiple ornaments by animals can be explained when those multiple ornaments are sexually selected. However, there have been only a few studies of sexual selection on multiple ornaments. We investigated sexual selection on two ornaments, plumage coloration and white spots in the tail, in a population of Barn Swallows Hirundo rustica gutturalis in Japan. There was sexual dimorphism in throat coloration and in the size of the white spots in the tail. Males with a less saturated (colourful) throat and larger white spots in the tail bred earlier than others, indicating a mating advantage for these males. These trends are what would be expected if these ornaments were indeed sexually selected.},
 pages = {141--148},
 title = {Mating advantage of multiple male ornaments in the Barn Swallow Hirundo rustica gutturalis},
 volume = {9},
 year = {2010}
}