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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
Jan Veen, Auteur ; Hanneke Dallmeijer, Auteur ; Almut E. Schlaich, Auteur ; Thor Veen, Auteur ; Wim C. Mullié, AuteurWest African Slender-billed Gulls Chroicocephalus genei are considered vulnerable due to a very restricted breeding range. However, little information on their ecology is available to support conservation action. We describe diet and foraging ra[...]
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
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
Raymond Klaassen, Auteur ; Almut E. Schlaich, Auteur ; Willem Bouten, Auteur ; Christiaan Both, Auteur ; Ben J. Koks, AuteurA small breeding population (3-5 pairs) of Hen Harriers recently established in the east of the province of Groningen, the Netherlands, in large scale arable farmland. We equipped three adults, two males and one female, with UvA-BiTS GPS loggers[...]
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[...]
