Abstract
During field work on foraging of the Ortolan Bunting Emberiza hortulana in a small and isolated population at Kvismaren in the county of Örebro in south Sweden, two females, nesting 1,250 m apart were observed to be mate-guarded by the same colour-ringed male. Although the male commuted between the nests, none of the females seemed to obtain any substantial help from him when feeding the young. Polygyni has been reported only once before in this species, namely seventy-five years ago, also in a small population in Sweden, when a male behaved in a similar manner to that that we observed at Kvismaren.
Highlights
Emberiza hortulana in a small and isolated population behaved in a similar manner to that that we observed at at Kvismaren in the county of Örebro in south Sweden, two females, nesting 1250 m apart were observed to be mate-guarded by the same colour-ringed male
Så vitt vi kunde observera hjälpte den polygyna hannen i liten utsträckning till med uppfödningen av ungarna i boet vid Sörön
Hanen av ortolansparv som hade två honor med bo 1250 meter från varandra vid Sörön och Lindåsa i Kvismaren 2017
Summary
Emberiza hortulana in a small and isolated population behaved in a similar manner to that that we observed at at Kvismaren in the county of Örebro in south Sweden, two females, nesting 1250 m apart were observed to be mate-guarded by the same colour-ringed male. Den 2 maj 2017 upptäcktes en nyanländ hanne av ortolansparv Emberiza hortulana i en björkholme på slätten nordost om Sörön i Kvismaren (Anderssons holme). Den 3 maj sjöng samma individ vid Lindåsabacken ytterligare ca 500 m mot öster. Parningsförsök noterades den 16 maj 2017 vid Lindåsabacken och paret visade sig sedermera häcka där.
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