American Redstart (Setophaga ruticilla) Science Article 7 abstract Understanding the causes of variation in feather colour in free-living migratory birds has been challenging owing to our inability to track individuals during the moulting period when colours are acquired. Using stable-hydrogen isotopes to estimate moulting locality, we show that the carotenoid-based yellow
Category: North America
Age-specific differences in habitat selection by the American Redstart
American Redstart (Setophaga ruticilla) Science Article 8 abstract The American Redstart (Setophaga ruticilla) is unusual among parulids becausemales retain immature plumage until after the first breeding season. On the basisof this character, age-specific differences in habitat occupation have been reported(Ficken and Ficken 1967, Wilson Bull. 79: 188). In 1969 I sampled some redstarthabitats near Pellston, […]
The Migration of the American Golden Plover Through Surinam
American Golden Plover (Pluvialis dominica) Science Article 8 abstract American Golden Plover (Pluvialis dominica) has the fame of making a long transoceanic flight in autumn from Nova Scotia to northern South America and after a short stop proceeding to its winter quarters in Argentina. In spring the birds are said to return in a long […]
Double brooding by American kestrels in Idaho.
American Kestrel (Falco sparverius) Science Article 22 abstract No abstract Steenhof, K. and B.E. Peterson. 1997, J. Raptor Res. 31(3):274-297. Download article download full text (pdf)
Antibody-mediated immunotoxicity in American Kestrels (Falco sparverius) exposed to polychlorinated biphenyls.
American Kestrel (Falco sparverius) Science Article 23 abstract Antibody-mediated immune function in adult and recently fledged (30 to 33 d old) American kestrels (Falco sparverius) was examined in birds exposed directly, or only in ovo, to polychlorinated biphenyls (PCBs). In 1998, 9 mature male and 9 female kestrels were fed PCBs, whereas 9 females and […]
Linking fluctuations in rainfall to nonbreeding season performance in a long-distance migratory bird, Setophaga ruticilla
American Redstart (Setophaga ruticilla) Science Article 1 abstract Research on long-distance migratory birds has yielded some of the strongest evidence that shifts in climate are changing ecosystem processes. Much of this work has focused on understanding whether rising temperatures on temperate breeding grounds are advancing migration phenology and limiting reproductive success. However, conditions on tropical […]
Night use by ducklings of active American Coot, Fulica americana, nests.
American Coot (Fulica americana) Science Article 7 abstract Coots were monitored at night contained ducklings. The nests hatched normally PETER L. HURD, Canadian Field Naturalist 107: 364. Download article download full text (pdf)
Review of the Status of American and Caribbean Coots in the United States Virgin Islands
American Coot (Fulica americana) Science Article 8 abstract Breeding (and non-breeding) American (Fulica americana) and Caribbean (F. caribaea) coots are generally rare to uncommon in the United States Virgin Islands where they have a restricted distribution at some brackish and freshwater sites. Their sympatric range includes St. Croix, where coots are most numerous at brackish […]
Carotenoids in the eggs of american coots: associations with size of eggs, local environment, and diet
American Coot (Fulica americana) Science Article 9 abstract I studied carotenoids in the eggs of American coots (Fulica americana) from 3 study sites in Saskatchewan, Canada. I supplemented two diet types designed to reduce carotenoids in the diet of laying coots to investigate the relationship of carotenoids and the size of eggs and to examine […]
Pacific and American Golden-Plovers: reflections on conservation needs
American Golden Plover (Pluvialis dominica) Science Article 3 abstract Much has been learned about the biology of Pacific and American Golden-Plovers (Pluvialis fulva and P. dominica)in recent years. However, most of this information does not address conservation-related questionsaffecting the future of these birds. We lack accurate demographic figures (guesstimates of world populationvary more than 30-fold […]