Dwarf eggs in some hole-nesting species

Most read articles by the same author(s)

• Erik Borgström, Lars Schütt, A long term study (1938–2004) of arrival dates of migratory birds in middle Värmland , Ornis Svecica: Vol. 16 No. 3 (2006)
• Erik Borgström, Mixed clutches of Pied Flycatcher Ficedula hypoleuca, Blue Tit Parus caeruleus, and Great Tit P. major , Ornis Svecica: Vol. 15 No. 1 (2005)
• Erik Borgström, Dwarf eggs—an addition , Ornis Svecica: Vol. 15 No. 3 (2005)
• Erik Borgström, Distribution and breeding ecology of the Dipper Cinclus c. cinclus in the province of Värmland, central Sweden , Ornis Svecica: Vol. 1 No. 2 (1991)
• Erik Borgström, Findings from a long-term study of the breeding biology of a Scandinavian population of the Great Tit Parus major , Ornis Svecica: Vol. 17 No. 2 (2007)
• Erik Borgström, On the breeding ecology of the Goldeneye Bucephala clangula in middle Värmland , Ornis Svecica: Vol. 16 No. 4 (2006)