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Article
Henning Heldbjerg, Auteur ; Anthony D. Fox, Auteur ; Thorsten J. S. Balsby, Auteur ; Peder V. Thellesen, AuteurNight-brooding of nestlings in cavity-nesting avian species carries predation risks to parents. Anecdotally, several species are known to shift from constant adult night-brooding behaviour to leaving nestlings unattended at night during offsprin[...]
Article
During 1971-1998, a total of 8780 nestling Starlings were ringed in the county of Ribe, SW Jutland, most of them in Hjortkaer (77% of the broods). In the same period, 392 full-grown Starlings (21 juv., 371 ad.) were ringed, and 327 of them, as w[...]
Article
A population of Barn Swallow Hirundo rustica was monitored during 1971-1998 at a farm in Hjortkaer, southwestern Jutland (55degree32'N 8degree43'E). The population size was 13-29 pairs (Fig. 1). The proportion of pairs laying a 2nd clutch was 68[...]
Article
For 45 years (1971-2015), I have studied the breeding biology of the Starling in Southwest Jutland concentrated on a colony at my dairy farm in Hjortaer (5532 N, 08.43 E), housed in up to 27 nest boxes where birds have been ringed every year (Hj[...]
