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Portrait of Henrik Smith. Photo.

Henrik Smith


Portrait of Henrik Smith. Photo.

Paternal care in the European starling, Sturnus vulgaris: nestling provision


  • Maria Sandell
  • Henrik G. Smith
  • Måns Bruun

Summary, in English

The extent to which male birds in polygynous species with biparental care assist in nestling feeding often varies considerably between nests of different mating status. Both how much polygynous males assist and how they divide their effort between nests may have a profound effect on the evolution of mating systems. In this study we investigated how males in the facultatively polygynous European starling Sturnus vulgaris invested in their different nests. The amount of male assistance affected the quality of the offspring. Polygynous males invested as much as monogamous males, but divided their effort asymmetrically between nests, predominantly feeding nestlings of first-mated (primary) females. Although females partly compensated for loss of male assistance, total feeding frequency was lower at primary females' nests than at monogamous females nests. Secondary females received even less assistance with nestling rearing, and the extent to which males assisted decreased with the length of the interval between the hatching of the primary and secondary clutches. These results are contrasted with those from a Belgian populations of starlings with a much more protracted breeding season and thus greater opportunities for males to attract additional mates during the nestling rearing period. The results show that both the ''defence of male parental investment model'' and the ''asynchronous settlement model'' have explanatory power, but that their validity depends on the potential length of the breeding season.


  • Centre for Environmental and Climate Science (CEC)
  • Biodiversity
  • Biodiversity and Conservation Science

Publishing year







Behavioral Ecology



Document type

Journal article


Oxford University Press


  • Zoology
  • Ecology


  • Nestling feeding
  • Parental investment
  • Mating systems



Research group

  • Biodiversity and Conservation Science


  • ISSN: 1045-2249