The vertebrate stress response helps animals respond to environmental dangers such as
predators or storms. An important component of the stress response is glucocorticoid (GC) …

Stressors elicit a complex but variable suite of endocrine events. Comparative studies of the
stress response have focused primarily on the adrenocortical response to stress, in …

The first comprehensive review of all aspects of the biology of moult, drawing information
from across the literature and in all birds, from penguins to passerines. Feathers are …

Many bird species reproduce earlier in years with high spring temperatures, but little is
known about the causal effect of temperature. Temperature may have a direct effect on …

In this paper, we review the relationships that link avian parental behavior, stress (acute or
chronic) and energetic constraints to the secretion of prolactin, the 'parental hormone' …

Hormones coordinate the co-expression of behavioral, physiological, and morphological
traits, giving rise to correlations among traits and organisms whose parts work well together …

Monogamous and polygynous male songbirds generally differ in their breeding season
profiles of circulating testosterone. Testosterone level spikes early in the breeding season of …

The ultimate factors influencing age-specific reproductive performance in birds have been
widely discussed, and several hypotheses have been suggested to explain why …

Understanding physiological and behavioral mechanisms underlying the diversity of
observed life-history strategies is challenging because of difficulties in obtaining long-term …

We have recently demonstrated the existence of a neuromodulatory regulation of prolactin
secretion by the opioid system showing a paradoxical opioid-induced prolactin suppression …