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Article
Dispersal patterns of the first White-backed Vulture (Gyps africanus) GPS-tracked in Iberia
Observations of African vulture species (Gyps rueppelli and Gyps africanus) in Iberia have increased in recent years, probably anticipating a process of progressive colonization. Thus, it is fundamental to analyz...
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Article
Open AccessRüppell’s Vulture (Gyps rueppelli): a new vulture species for Europe?
The Rüppell's Vulture, formerly restricted to a strictly African distribution, has recently been classified as a Critically Endangered species worldwide. However, in recent decades, observations of the species...
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Article
Open AccessPlasma chemistry and hematology reference values in wild nestlings of White-tailed Sea Eagles (Haliaeetus albicilla): effects of age, sex and hatching date
Studies on normal concentration of blood constituents of free-living birds are not very common. An adequate knowledge of blood chemistry is greatly recommended for those projects involving research and managem...
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Article
Comment on “Lagged response of Adélie penguin (Pygoscelis adeliae) abundance to environmental variability in the Ross Sea, Antarctica”
Chen et al. (Polar Biology, 43(11):1769–1781) recently reported lagged, region-specific responses of Adélie penguin (Pygoscelis adeliae) abundance to environmental variability in the Ross Sea, Antarctica. Thei...
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Article
Open AccessParent–offspring conflict and transition to crèche phase in Chinstrap Penguins (Pygoscelis antarctica)
Parent–offspring conflict theory predicts that offspring seek to prolong the parental care period, while parents strive to shorten it as much as possible. Transition to the crèche phase in penguins involves ch...
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Article
Blood plasma biochemistry and the effects of age, sex, and captivity in Short-toed Snake Eagles (Circaetus gallicus)
Physiology can either be a product of or affect the behavior and ecology of individual animals. Blood plasma chemistry contains many components that are indicative of several aspects of a bird’s physiological ...
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Article
Maintenance of nest quality in Adélie penguins Pygoscelis adeliae: an additional benefit to life in the center
In colonial seabirds, differences in the nesting or fledging success have been associated with differences in nest position within the breeding aggregation (subcolony): less successful nests are located on the...
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Article
Juvenile dispersal in an uninhabited continent: young Spanish Imperial Eagles in Africa
The Spanish Imperial Eagle (Aquila adalberti) disappeared from Africa as a breeding species in the 1960s coincident with a general decline of their populations in the Iberian Peninsula. Because of a combination o...
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Article
Skewed sex ratios in a newly established osprey population
With recent increases in the numbers of reintroduction projects, it has become crucial to know the main factors that allow colonization of new areas and prevent the extinction of small and reintroduced popula...
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Article
Tick infestations correlates at a Falkland Islands Black-browed Albatross colony
The tick Ixodes uriae is an ectoparasite widely distributed among seabirds throughout circumpolar regions, usually associated with seabird colonies. Nevertheless, potential effects of infestations, especially in ...
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Article
Blood chemistry values in nestlings of Rockhopper Penguins (Eudyptes chrysocome): the effect of sex and body condition
Hematological studies concerned with the determination of normal values of blood parameters in animals have been increasing. However, studies on normal concentration of blood constituents of free-living birds ...
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Article
Productivity is related to nest site protection and nesting substrate in a German Osprey population
The Osprey (Pandion haliaetus) is an emblematic example of conservation. Currently, the species is progressively recovering in population size and range after dramatic reductions as a consequence of human persecu...
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Article
Factors affecting plasma chemistry values of the black-browed albatross Thalassarche melanophrys
Blood chemical reference values and variations in them in long-lived endangered birds are of metabolic, veterinary, ecological and/or taxonomic interest. In the present study, we for the first time provide suc...
