Raptors & Owls
Universität Bielefeld > Faculty of Biology > Animal Behaviour > Behavioural Ecology > Raptors & Owls


Scientific Articles


Boerner, M., Hoffman, J. I., Amos, W., Chakarov, N. & Krüger, O. No correlation between multi-locus heterozygosity and fitness in the common buzzard despite heterozygote advantage for plumage colour. J. Evol. Biol. 26: 2233-2243. pdf

Chakarov, N., Jonker, R. M., Boerner, M., Hoffman, J. I. & Krüger, O. Variation at phenological candidate genes correlates with timing of dispersal and plumage morph in a sedentary bird of prey. Mol. Ecol. 22: in press. pdf

Grünkorn, T., Potiek, A., Jonker, R. M., Chakarov, N. & Krüger, O. Territory quality affects the relative importance of habitat heterogeneity and interference competition in a long-lived, territorial songbird. J. Avian. Biol. 44: in press. pdf


Chakarov, N., Greiner, J., Hauser, S., Schuetzmann, D., Krüger, O., Boerner, M. & Widera, D. Label-free enrichment of avian Leucocytozoons using flow cytometric sorting. Parasitology 139: 1547-1552. pdf

Krüger, O., Chakarov, N., Nielsen, J.T., Looft, V., Grünkorn, T., Struwe-Juhl, B. & Moller, A.P. Population regulation by habitat heterogeneity or individual adjustment? J. Anim. Ecol. 81: 330-340. pdf


Chakarov, N. & Krüger, O. Mesopredator release by an emergent superpredator: a natural experiment of predation in a three level guild. PLoS One 5: e15229. pdf

Krüger, O., Grünkorn, T. & Struwe-Juhl, B. The return of the white-tailed eagle (Haliaeetus albicilla) to northern Germany: modelling the past to predict the future. Biol. Conserv. 143: 710-721. pdf


Boerner, M. & Krüger, O. Aggression and fitness differences between plumage morphs in the common buzzard (Buteo buteo). Behav. Ecol. 20: 180-185. pdf

Krüger, O. Common buzzard, goshawk, eagle owl: a natural experiment in Eastern Westphalia. Populationsökol. Greifvögel und Eulen 6: 303-312.


Chakarov, N., Boerner, M. & Krüger, O. Fitness in common buzzards at the cross-point of opposite melanin-parasite interactions. Funct. Ecol. 22: 1062-1069. pdf

Krüger, O. Engines of speciation: a comparative study in birds of prey. J. Evol. Biol. 21: 861-872. pdf


Krüger, O. Long-term demographic analysis in goshawk Accipiter gentilis: the role of density-dependence and stochasticity. Oecologia 152: 459-471. pdf


Krüger, O. The evolution of reversed size dimorphism in hawks, falcons and owls: a comparative analysis. Evol. Ecol. 19: 467-486. pdf

Krüger, O. Age at first breeding and fitness in goshawk Accipiter gentilis. J. Anim. Ecol. 74: 266-273. pdf


Krüger, O. The importance of competition, food, habitat, weather and phenotype for the reproduction of Buzzard Buteo buteo. Bird Study 51: 125-132. pdf


Fowlie, M.K. & Krüger, O. The evolution of plumage polymorphism in birds of prey and owls: the apostatic selection hypothesis revisited. J. Evol. Biol. 16: 577-583. pdf


Krüger, O. Dissecting common buzzard lifetime reproductive success: the relative importance of food, competition, weather, habitat and individual attributes. Oecologia 133: 474-482. pdf

Krüger, O. Analysis of nest occupancy and nest reproduction in two sympatric raptors: common buzzard Buteo buteo and goshawk Accipiter gentilis. Ecography 25: 523-532. pdf

Krüger, O. Interactions between Common Buzzard Buteo buteo and Goshawk Accipiter gentilis: trade-offs revealed by a field experiment. Oikos 96: 441-452. pdf


Krüger, O., Lindström, J. & Amos, W. Maladaptive mate choice maintained by heterozygote advantage. Evolution 55: 1207-1214. pdf

Krüger, O. & Lindström, J. Habitat heterogeneity affects population growth in goshawk Accipiter gentilis. J. Anim. Ecol. 70: 173-181. pdf

Krüger, O. & Lindström, J. Lifetime reproductive success in Common Buzzard Buteo buteo: from individual variation to population demography. Oikos 93: 260-273. pdf


Krüger, O. Correlates of population density and body weight of raptors in the family Accipitridae: a comparative study. J. Zool. 250: 185-192. pdf

Krüger, O. & Stefener, U. Populationsfluktuation und die Rolle der Reproduktion in einer Population des Habichts Accipiter gentilis. Populationsökol. Greifvögel und Eulen 4: 263-271.


Krüger, O. Besonderheiten der Revierstruktur des Habichts im Teutoburger Wald. Charadrius 37: 110-112.

Krüger, O. & Stefener, U. Nahrungsökologie und Populationsdynamik des Habichts (Accipiter gentilis) im östlichen Westfalen. Vogelwelt 117: 1-8.


Krüger, O. Revierverhalten des Mäusebussards in Ostwestfalen. Young Researcher 10: issue 40: 32-37.


Krüger, O. Was schmeckt dem Mäusebussard? Young Researcher 7: issue 17: 12-16.

Book chapters

Chakarov, N., Boerner, M. & Krüger, O. Biological consequences of plumage polymorphism in common buzzard. In: Forest raptors. Conservation, ecology, behaviour and management implications (Zuberogoitia, I. & Martinez, J. E., eds.), pp. 235-241.



Krüger, O. Nest site selection in Northern Goshawk: linking habitat choice to individual fitness and population dynamics. In: Habitat management for endangered raptors; habitat analysis, conservation and assessment (Abe, M. ed.), pp. 91-104. Tokyo.




Prof. Dr. Oliver Krüger

Bielefeld University
Animal Behaviour
Morgenbreede 45
33615 Bielefeld

Tel. ++49 521 106 2842