McKinnon, Laura; Gilchrist, H. Grant; Scribner, Kim T. - In: Behavioral Ecology 17 (2006) 4, pp. 614-621
Kin-based social groups are commonly studied among cooperatively breeding species but have been less studied in "nontraditional" group breeding systems. We investigated the presence of kin-based sociality among females in the common eider (Somateria mollisima), a colonial nesting sea duck that...