Détail de l'auteur
Documents disponibles écrits par cet auteur (5)
Ajouter le résultat dans votre panier Affiner la recherche
Article
In this study, results of counts of adult Black-necked Grebes from the shore and from a rowing-boat were compared with the number of nests. The study was made in the vegetation-rich Lake Brabrand in Jutland. Repeated nest-counts suggested 32 pai[...]
Article
Little Grebes shed their flight feathers simultanously and individuals are flightless for three to four weeks, mainly during August-September (Cramp and Simmons 1977). Many of these birds assemble to moult at certain, often traditional sites (Vl[...]
Article
Article
The daily time budget of Coots Fulica atra was calculated from 36 hours of observation during January and February 1997-1999 on flooded meadows at Lake Brabrand, eastern Jutland. Groups of 5-66 Coots were scan-sampled (Altmann 1974) every three [...]
Article
The daily time budget of Little Grebes Tachybaptus ruficollis was calculated from 13 hours of observation ultimo September 2002 in Norsminde Fjord, a brackish, sheltered inlet in eastern Jutland. Groups of 5-15 grebes were scan sampled (Altmann [...]
