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Article
Roeland A. Bom, Auteur ; Jesse R. Conklin, Auteur ; Yvonne I. Verkuil, Auteur ; José A. Alves, Auteur ; Jimmy De Fouw, Auteur ; Anne Dekinga, Auteur ; Chris J. Hassell, Auteur ; Raymond H. G. Klaassen, Auteur ; Andy Y. Kwarteng, Auteur ; Eldar Rakhimberdiev, Auteur ; Afonso Rocha, Auteur ; Job Ten Horn, Auteur ; T. Lee Tibbitts, Auteur ; Pavel S. Tomkovich, Auteur ; Reginald Victor, Auteur ; Theunis Piersma, AuteurDans Ibis (164(2) 2022)Long-distance migratory species often include multiple breeding populations, with distinct migration routes, wintering areas and annual-cycle timing. Detailed knowledge on population structure and migratory connectivity provides the basis for st[...]
Article
Angela Wieringa, Auteur ; Raymond H. G. Klaassen, Auteur ; Almut E. Schlaich, Auteur ; Ben J. Koks, AuteurIn many owl and raptor species, sexes have distinct parental roles. Females incubate the eggs and raise the chicks until independence, while males provide females and their chicks with food. This is believed to reduce sexual conflict over parent[...]
Article
Paula Machín, Auteur ; Juan Fernández-Elipe, Auteur ; Heiner Flinks, Auteur ; Maite Laso, Auteur ; José I. Aguirre, Auteur ; Raymond H. G. Klaassen, AuteurFennoscandian alpine tundra habitats support large numbers of breeding waders, but relatively little is known about their breeding ecology despite the fact that this habitat is threatened by climate change. We studied habitat selection, diet and[...]
Article
Iben H. Sørensen, Auteur ; Almut E. Schlaich, Auteur ; Raymond H. G. Klaassen, Auteur ; Henning Heldbjerg, Auteur ; Ben J. Koks, AuteurOver-summering within or near the African wintering range by immature, non-breeding individuals occurs regularly in several species of long-distance migratory raptors, yet the extent of over-summering in Africa by adult birds remains unclear. In[...]
Article
Jimmy De Fouw, Auteur ; Andrew W. Thorpe, Auteur ; Roeland A. Bom, Auteur ; Steven de Bie, Auteur ; Kees Camphuysen, Auteur ; Brian Etheridge, Auteur ; Ward Hagemeijer, Auteur ; Lenze Hofstee, Auteur ; Theo Jager, Auteur ; Leon Kelder, Auteur ; Romke Kleefstra, Auteur ; Marcel Kersten, Auteur ; Szabolcs Nagy, Auteur ; Raymond H. G. Klaassen, AuteurBarr Al Hikman, a large intact coastal wetland in the Sultanate of Oman, is an important wintering site for migratory waterbirds in the Asian-East African Flyway. The last reported systematic survey of the area is from 1990. Here, we present res[...]
Article
Heather M. Williams, Auteur ; Mikkel Willemoes, Auteur ; Raymond H. G. Klaassen, Auteur ; Roine Strandberg, Auteur ; Kasper Thorup, AuteurKnowledge of species’ habitat requirements can be gained from studying individual variation in home range size, under the assumption that larger home ranges reflect increased resource needs or decreased habitat quality. We used satellite telemet[...]
Article
Heather M. Williams, Auteur ; Mikkel Willemoes, Auteur ; Raymond H. G. Klaassen, Auteur ; Roine Strandberg, Auteur ; Kasper Thorup, AuteurKnowledge of species’ habitat requirements can be gained from studying individual variation in home range size, under the assumption that larger home ranges reflect increased resource needs or decreased habitat quality. We used satellite telemet[...]
Article
Heather M. Williams, Auteur ; Mikkel Willemoes, Auteur ; Raymond H. G. Klaassen, Auteur ; Roine Strandberg, Auteur ; Kasper Thorup, AuteurKnowledge of species’ habitat requirements can be gained from studying individual variation in home range size, under the assumption that larger home ranges reflect increased resource needs or decreased habitat quality. We used satellite telemet[...]
Article
Ying-Chi Chan, Auteur ; Maarten Brugge, Auteur ; T. Lee Tibbitts, Auteur ; Anne Dekinga, Auteur ; Ron Porter, Auteur ; Raymond H. G. Klaassen, Auteur ; Theunis Piersma, AuteurSmall solar-powered satellite transmitters and GPS data loggers enable continuous, multi-year, and global tracking of birds. What is lacking, however, are reliable methods to attach these tracking devices to small migratory birds so that (1) fli[...]
Article
Ying-Chi Chan, Auteur ; Maarten Brugge, Auteur ; T. Lee Tibbitts, Auteur ; Anne Dekinga, Auteur ; Ron Porter, Auteur ; Raymond H. G. Klaassen, Auteur ; Theunis Piersma, AuteurSmall solar-powered satellite transmitters and GPS data loggers enable continuous, multi-year, and global tracking of birds. What is lacking, however, are reliable methods to attach these tracking devices to small migratory birds so that (1) fli[...]
Article
Almut E. Schlaich, Auteur ; Raymond H. G. Klaassen, Auteur ; Willem Bouten, Auteur ; Christiaan Both, Auteur ; Ben J. Koks, AuteurFarmland birds are in steep decline and agri-environment schemes (AES) to counteract these biodiversity losses are expensive and inefficient. Here we test a novel AES, ‘Birdfields’, designed using detailed ecological knowledge of the target spec[...]
Article
Almut E. Schlaich, Auteur ; Raymond H. G. Klaassen, Auteur ; Willem Bouten, Auteur ; Christiaan Both, Auteur ; Ben J. Koks, AuteurFarmland birds are in steep decline and agri-environment schemes (AES) to counteract these biodiversity losses are expensive and inefficient. Here we test a novel AES, Birdfields\', designed using detailed ecological knowledge of the target spec[...]
Article
Anders Hedenström, Auteur ; Raymond H. G. Klaassen, Auteur ; Susanne Åkesson, AuteurCapsule Little Ringed Plovers breeding in South Sweden migrate towards the southeast in the autumn, via the Middle East, to winter in Saharan and sub-Saharan locations or in India, while the spring migration is more directly towards the north.Ai[...]
Article
Anders P. Tøttrup, Auteur ; Raymond H. G. Klaassen, Auteur ; Roine Strandberg, Auteur ; Kasper Thorup, Auteur ; Mikkel Willemoes Kristensen, Auteur ; Peter Søgaard Jørgensen, Auteur ; James Fox, Auteur ; Vsevolod Afanasyev, Auteur ; Carsten Rahbek, Auteur ; Thomas Alerstam, AuteurThe small size of the billions of migrating songbirds commuting between temperate breeding sites and the tropics has long prevented the study of the largest part of their annual cycle outside the breeding grounds. Using light-level loggers (geol[...]
Article
Thomas Alerstam, Auteur ; Jason W. Chapman, Auteur ; Johan Bäckman, Auteur ; Alan D. Smith, Auteur ; Håkan Karlsson, Auteur ; Cecilia Nilsson, Auteur ; Don R. Reynolds, Auteur ; Raymond H. G. Klaassen, Auteur ; Jane K. Hill, AuteurVast numbers of insects and passerines achieve long-distance migrations between summer and winter locations by undertaking high-altitude nocturnal flights. Insects such as noctuid moths fly relatively slowly in relation to the surrounding air, w[...]
Article
Åke Lindström, Auteur ; Juliana Danhardt, Auteur ; Martin Green, Auteur ; Raymond H. G. Klaassen, Auteur ; Peter Olsson, AuteurToday's intensive farming practices are known to have affected farmland biodiversity negatively in many different ways. As far as birds are concerned, they are known to have suffered during both summer and winter. Relatively little is known abou[...]
Article
Roine Strandberg, Auteur ; Raymond H. G. Klaassen, Auteur ; Mikael Hake, Auteur ; Patrik Olofsson, Auteur ; Kasper Thorup, Auteur ; Thomas Alerstam, AuteurWe tracked three juvenile and 14 adult Marsh Harriers Circus aeruginosus from southern Sweden via satellite to investigate migration strategies. Four individuals were tracked for at least two years. All three juveniles and four of the adults mad[...]
Article
Roine Strandberg, Auteur ; Raymond H. G. Klaassen, Auteur ; Patrik Olofsson, Auteur ; Thomas Alerstam, AuteurWe analysed satellite tracking data to reveal the daily travel schedules of Hobbies Falco subbuteo migrating between northern Europe and southern Africa. By comparing movements during short-time intervals of 1-8 h at different times of the day b[...]
Article
Rob S. A. van Bemmelen, Auteur ; Johannes Hungar, Auteur ; Ingrid Tulp, Auteur ; Raymond H. G. Klaassen, AuteurWe studied migration and wintering patterns of a wader with a pelagic lifestyle during the non-breeding period, the red-necked phalarope Phalaropus lobatus. Using light-level geolocation, we obtained three full annual tracks and one autumn migra[...]
Article
Raymond H. G. Klaassen, Auteur ; Bart A. Nolet, Auteur
Article
Raymond H. G. Klaassen, Auteur ; Bart A. Nolet, Auteur ; Danielle Bankert, AuteurDans Ardea (94(3) 2006)The efficiency in which high-density food patches are found is determined by the way foragers move between patches. In this study we explore the effect of social interactions on the foraging path, in particular the distance moved between patches[...]
Article
Raymond H. G. Klaassen, Auteur ; Roine Strandberg, Auteur ; Mikael Hake, Auteur ; Patrik Olofsson, Auteur ; Anders P. Tottrup, Auteur ; Thomas Alerstam, AuteurLoop migration among birds is characterized by the spring route lying consistently west or east of the autumn route. The existence of loops has been explained by general wind conditions or seasonal differences in habitat distribution. Loop migra[...]
Article
Raymond H. G. Klaassen, Auteur ; Almut E. Schlaich, Auteur ; Willem Bouten, Auteur ; Ben J. Koks, AuteurTime budgets are a powerful but hitherto seldom used way to study how migrants organise their bi-annual travels. We studied daily time budgets of travelling Montagu's harriers Circus pygargus, based on GPS tracking data, in which we were particu[...]
Article
Åke Lindström, Auteur ; Thomas Alerstam, Auteur ; Peter Bahlenberg, Auteur ; Robert Ekblom, Auteur ; James W. Fox, Auteur ; Johan Raghall, Auteur ; Raymond H. G. Klaassen, AuteurThe migration of the great snipe Gallinago media was previously poorly known. Three tracks in 2010 suggested a remarkable migratory behaviour including long and fast overland non-stop flights. Here we present the migration pattern of Swedish mal[...]
Article
Anders P. Tottrup, Auteur ; Lykke Pedersen, Auteur ; Alejandro Onrubia, Auteur ; Raymond H. G. Klaassen, Auteur ; Kasper Thorup, AuteurThe current Northern Hemisphere migration systems are believed to have arisen since the last glaciation. In many cases, birds do not migrate strait from breeding to non-breeding areas but fly via a detour. All western European populations of red[...]
Article
Roine Strandberg, Auteur ; Mikael Hake, Auteur ; Raymond H. G. Klaassen, Auteur ; Thomas Alerstam, AuteurStrandberg R., Hake M., Klaassen R.H.G. & Alerstam T. 2012. Movements of immature European Honey Buzzards Pernis apivorus in tropical Africa. Ardea 100: 157-162. Immature European Honey Buzzards Pernis apivorus are believed to remain in tropical[...]
Article
Bart A. Nolet, Auteur ; Abel Gyimesi, Auteur ; Raymond H. G. Klaassen, Auteur1. The carrying capacity of a site for migratory water birds, expressed in bird-days, can be of particular conservation value. Several attempts have been made to model this carrying capacity using ideal free distribution models such as, for inst[...]
Article
Roine Strandberg, Auteur ; Raymond H. G. Klaassen, Auteur ; Kasper Thorup, AuteurWe describe the migration performance of three long-distance migrating raptors, osprey Pandion haliaetus, honey buzzard Pernis apivorus and marsh harrier Circus aeruginosus, and one short-distance migrating raptor, common buzzard Buteo buteo bas[...]
