Masked Booby (Sula dactylatra) Science Article 3 abstract Many hypotheses have been formulated to explain the causes of the relatively uncommon phenomenon of siblicidal aggression. All have been supported by evidence, however, no single hypothesis can fully explain the cause of avian siblicidal aggression Melissa Schramm ET AL., Avian Siblicidal Aggression Download article download full […]
Timing and synchronisation of breeding in a Marsh Tit Parus palustris population from a primaeval forest
Marsh Tit (Parus palustris) Science Article 2 abstract Marsh Tits Parus palustris in Bialowieza National Park (E. Poland, 1985-97) were single brooded, laid their first eggs between 5 April and 11 May (mean 21 April). Nest building commenced on average 10-15 days before the first egg was laid, but overlapped partially with egg laying. Median […]
Habitat selection by Marsh Tits Poecile palustris in the UK
Marsh Tit (Parus palustris) Science Article 3 abstract The Marsh Tit Poecile palustris is a small, hole-nesting woodland passerine whose national population in the UK has declined by more than 50% in the last 25 years. To investigate possible causes for the species long-term decline, we examined habitat selection by Marsh Tits at three scales. […]
Seasonal decline in clutch size of the Marsh Tit (Parus palustris) in relation to date-specific survival of offspring
Marsh Tit (Parus palustris) Science Article 1 abstract This paper documents and evaluates seasonal trends in reproductive performance in the Marsh Tit (Parus palustris)in southern Sweden. Clutch size decreased for nests started later in the season. This pattern held true both for second-year and older females when analyzed separately In dividual females adjusted clutch size […]
LIFE HISTORY OF THE MARBLED WOOD-QUAIL
Marbled Wood-Quail (Odontophorus gujanensis) Science Article 1 abstract The Marbled Wood-Quail (Odontophorus gujanensis) is widely distributed through the forested regions of northern South America, but in Central America it ranges no farther north than southweste.m Costa Rica, where it is represented by the Chiriqui race (0. g. castigatus) . Birds of this species are stout, […]
Survival of Marbled Teal (Marmaronetta angustirostris)released back into the wild
Marbled Duck (Marmaronetta angustirostris) Science Article 2 abstract Reintroduction or re-enforcement programmes are major tools in species conservation, but there is a need for more studies thatassess the influence of different husbandry and release methods on the survival of released animals. We investigated the survival ofglobally threatened Marbled Teal (Marmaronetta angustirostris) taken into captivity as […]
Use of wing tags and other methods to mark Marbled Teal (Marmaronetta angustirostris) in Spain.
Marbled Duck (Marmaronetta angustirostris) Science Article 1 abstract To design methods to mark Marbled Teal Marmaronetta angustirostris, to test these methods in captive conditions and to apply them in field research in Spain. Location: Marked birds were released at El Hondo, Valencian community (eastern Spain) and Donana (south-west Spain). Captive trials were conducted at nearby […]
RELATIVE USE OF SECONDARY FORESTS BY CRACIDS INCENTRAL AMAZONIA
Marail Guan (Penelope marail) Science Article 1 abstract Curassows, guans, and chachalacas (familyCracidae) are large-bodied (400 g to 3500 g)galliform birds found exclusively in the Americas,with most species restricted to SouthAmerica (Delacour & Amadon 1973, delHoyo 1994). Despite their important role inforest dynamics as dispersers of seed plants,most cracid species remain poorly known(Strahl & Grajal […]
THE PELAGIC ECOLOGY OF MANX SHEARWATERS PUFFINUS PUFFINUSOFF THE SOUTHEASTERN UNITED STATES OF AMERICA
Manx Shearwater (Puffinus puffinus) Science Article 1 abstract Knowledge of the biology of Manx Shearwaters Puffinus puffinus is largely based on dataobtained in and around breeding colonies. In this paper I provide information on various aspects of the marine ecology of this shearwater. The information presented here on age and sex ratios, masses, moult sequence […]
Vocalizations of the mallard (Anas platyrhynchos)
Mallard (Anas platyrhynchos) Science Article 11 abstract Qualitative descriptive information on both vocal and visual displays of waterfowl is abundant (e.g., Heinroth 1910, 1911: Lorenz 1953; Weidmann 1956; Johnsgard 1965; McKinney 1965a, 1969, 1970, and quantitive data are available for visual displays of a few species of ducks Abraham, R. L., The Condor 76(4):401-420 Download […]