Tag: Blue Grosbeak

FEMALE MATE CHOICE IN RELATION TO STRUCTURAL PLUMAGE COLORATION INBLUE GROSBEAKS

Blue Grosbeak (Passerina caerulea) Science Article 1 abstract Plumage blueness in Blue Grosbeaks (Passerina caerulea) is related to nutritional conditionduring molt, and bluer males hold larger territories with more food resources. We tested the hypothesis that females use male plumage brightness as a criterion in choosing mates. In a mate-choice aviary, we presented females with […]

Effects of breeding density and plumagecoloration on mate guarding and cuckoldry in bluegrosbeaks (Passerina caerulea)

Blue Grosbeak (Passerina caerulea) Science Article 3 abstract For species in which females mate outside of the pair bond, selection should favor male mate-guarding behaviors that minimize investment in genetically unrelated offspring. Mate guarding may impose costs by diverting time and energy from activities such as foraging and seeking extra-pair copulations, so males should adjust […]