Holger Holgersen

• Antarctic and sub-Antarctic birds
• Ants of Northern Norway (Hym., Form.)
• First breeding of the black-tailed godwit, Limosa limosa (L.), in Norway
• First record of the boarfish, Capros aper, in Norway
• Formica gagatoides Ruzs. in Norway
• Ornithology of the "Brategg" Expedition