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 […]
Category: Gruiformes
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 […]
Daily activity and intake rate patterns of wintering Common Cranes
Crane (Grus grus) Science Article 2 abstract Daily activity patterns of wintering Common Cranes Grus grus were studied at Gallocanta, NE Spain, and related with changes in foraging site, distance to roost and flocking behavior. Per cent time spent feeding, feeding bout length, and food intake rate showed two peaks, in early morning and late […]
Nest site selection of the Eurasian Crane Grus grus in Estonia: an analysis of nest record cards
Crane (Grus grus) Science Article 3 abstract We describe in detail the nesting habitats of the Eurasian Crane in Estonia and explore relationships between different habitat characteristics and nesting success.We analysed all 161 reported Eurasian Crane nest finds in Estonia.We found that the cranes favorite nesting habitats are different types of mire (71%of all nests), […]
The global status of the Corncrake
Corn Crake (Crex crex) Science Article 5 abstract The corncrake Crex crex is among 1,186 bird species (about 10% of all species) recently assessed as being globally threatened. Corncrake population declines are well documented in western Europe, but until recently little was known about populations and trends elsewhere in Europe and Asia. In the last […]
Effects of season, plasma testosterone and body size on corncrake (Crex crex) call rhythm.
Corn Crake (Crex crex) Science Article 3 abstract We tested whether the temporal parameters of corncrake (Crex crex) call change seasonally and/or individually. We defined a new, compound variable called RHYTHM, which quantitatively describes how corncrake call is perceived. Temporal parameters of calls, including RHYTHM, were significantly associated with both the time within the breeding […]
Influx van Kwartelkoningen Crex crex in Nederland in 1998
Corn Crake (Crex crex) Science Article 4 abstract Halverwege de jaren negentig leek het doek definitief gevallen voor de Nederlandse populatie Kwartelkoningen. Het broedbestand telde nog hooguit 60 territoria en zou gezien de ontwikkelingen in voorgaande jaren waarschijnlijk snel verder afnemen. Groot was dan ook de verrassing toen in 1997 uit het niets meer dan […]
Analyse van kerngebieden van Kwartelkoningen in Nederland in 1999 en 2000
Corn Crake (Crex crex) Science Article 8 abstract In het kader van de Bescherming Kwartelkoning 2001 (Gerritsen et al. 2001) is door SOVONVogelonderzoek Nederland een overzicht gemaakt van de gebieden die in Nederland van belang zijnvoor het voorkomen van de Kwartelkoning. Doel van deze analyse was het in kaart brengen van diegebieden die van nationale […]
International Single Species Action Planfor the Conservation of the Corncrake
Corn Crake (Crex crex) Science Article 11 abstract The Corncrake is considered ‘near threatened’ worldwide. It is included in Annex I of the EU Bird Directive, Appendix II of the Bern Convention and Appendix II of the Bonn Convention. Corncrakes breed widely across Eurasia, from the Atlantic to western Siberia. The core wintering area is […]
Kwartelkoningen in Nederland in 2004
Corn Crake (Crex crex) Science Article 7 abstract After a population recovery in 1997, efforts to protect Corncrakes in the Netherlands have increasedrecently. Since 2001, a national conservation scheme is carried out by Vogelbescherming Nederland(BirdLife The Netherlands), SOVON Vogelonderzoek Nederland (Dutch Centre for FieldOrnithology), the Ministry of Agriculture, Fisheries and Food Quality and several localgovernmenmental […]