Genus Sialia (organism)

In vertebrates, activation of the hypothalamo-pituitary-adrenal (HPA) axis in response to unpredictable events results in… (More)

Resource selection plasticity and behavioral dominance may influence the ability of a species to respond to changes in resource… (More)

Behaviors can facilitate colonization of a novel environment, but the mechanisms underlying this process are poorly understood… (More)

Identifying correlations among behaviors is important for understanding how selection shapes the phenotype. Correlated behaviors… (More)

1. Female birds deposit variable amounts of androgens in the yolks of their eggs, and it has been suggested that yolk androgen… (More)

Juan Moreno, Elisa Lobato, Judith Morales, Santiago Merino, Gustavo Tomás, Josué Martı́nez-de la Puente, Juan J. Sanz, Rafael… (More)

Several experimental studies have shown that female birds use ornamental melanin and carotenoid plumage coloration as criteria in… (More)

Although the function of ornamental traits in males has been the focus of intensive research for decades, expression of such… (More)

Life-history theory proposes that organisms must trade-off investment in current and future reproduction. Production of… (More)

Evidence suggests that structural plumage colour can be an honest signal of individual quality, but the mechanisms responsible… (More)