...Nathan Wolf; Gabriel J. Bowen; Carlos Martinez del Rio SUMMARY We investigated the relationships between the δdeuterium (δD) and the δ 18 oxygen (δ 18 O) of drinking water and the δD and δ 18 O of blood plasma, red blood cells and feathers in house sparrows ( Passer domesticus ) fed on diets...

... they occur and the negative consequences of exposure to glucocorticoids, has been problematic and limited to short-term physiological measures. By contrast, the quantification of corticosterone (CORT) in feathers represents a long-term, integrated measure of hypothalamic–pituitary–adrenal activity...

...Richard E. Brown; M. Roger Fedde ABSTRACT Mechanoreceptors on or near feather follicles in the wings of birds may provide information about airflow over the wing. We studied discharge characteristics of rapidly and slowly adapting mechanoreceptors associated with propatagial covert feathers, slowly...