Category: Gruiformes

Seasonal variation in Great Bustard Otis tarda diet in South Portugal with a focus on the animal component

Great Bustard (Otis tarda) Science Article 7 abstract The few studies available on Great Bustarddiet were carried out in Spain (Palacios et al.,1975; Lucio, 1985; Caballero, 2002) and EasternEurope (see Cramp & Simmons, 1980) andwere based on stomach analysis. Even fewerdata exist on the seasonal variation in diet composition,as only Lane et al. (1999), usingfaecal […]

The Great Bustard Otis tarda in Morocco: a re-evaluation of its status based on recent survey results

Great Bustard (Otis tarda) Science Article 5 abstract Between 1999 and 2005 five spring censuses of the Great Bustard Otis tarda population in Morocco were carried out, one of which (2003) was finally discarded due to bad weather conditions. Some complementary, partial counts in autumn 2000, winter 2001-2002 and spring 2004 were also carried out. […]

The Great Bustard Otis tarda in Andalusia, southern Spain: status, distribution and trends

Great Bustard (Otis tarda) Science Article 4 abstract Between 2001 and 2004 the first comprehensive census of Great Bustards Otis tarda was carried out in Andalusia, southern Spain. This region holds one of the most endangered populations of the Iberian Peninsula. The aims were to establish the locations of current leks and the numbers of […]

The Great Bustard Otis tarda in Andalusia, southern Spain: status, distribution and trends

Great Bustard (Otis tarda) Science Article 4 abstract Between 2001 and 2004 the first comprehensive census of Great Bustards Otis tarda was carried out in Andalusia, southern Spain. This region holds one of the most endangered populations of the Iberian Peninsula. The aims were to establish the locations of current leks and the numbers of […]

Seasonal population dynamics, nest site selection, sex-ratio and clutch size of the Great Bustard Otis tarda in two adjacent lekking areas.

Great Bustard (Otis tarda) Science Article 3 abstract This paper describes the seasonal variation in Great Bustard Otis tarda numbers in two adjacent lekking areas within Castro Verde, the most important site for this species in Portugal. Furthermore, the first data on the breeding biology of the species in the region are presented. The pattern […]

Daily activity patterns of Great Bustards Otis tarda

Great Bustard (Otis tarda) Science Article 1 abstract The daily activity patterns of the Great Bustard Otis tarda were investigated at Villafafila, NW Spain. This is the first published description of the time budget of this species. Time budgets were analysed according to sex, season and time of day, habitat and size and sex composition […]

Daily activity patterns of Great Bustards Otis tarda

Great Bustard (Otis tarda) Science Article 1 abstract The daily activity patterns of the Great Bustard Otis tarda were investigated at Villafafila, NW Spain. This is the first published description of the time budget of this species. Time budgets were analysed according to sex, season and time of day, habitat and size and sex composition […]

Verhalten von Kranichfamilien (Grus grus) in BrutrevierenNordostdeutschlands: Investition der Altviigel in ihre Nachkommen

Crane (Grus grus) Science Article 1 abstract Juveniles and immature birds normally have less foraging ability and a lower food intake rate than adults. This-it has been presumed-is compensated for by parental care and investment during juvenile development. Studies of time budgets and parental investment of Common Cranes were carried out in the years 1995 […]