Group of Black-throated Divers Gavia arctica preparing for the autumn migration
Viittaaminen
Voipio, P. (1990). Group of Black-throated Divers Gavia arctica preparing for the autumn migration. Ornis Fennica, 67(4), 142–143. Noudettu osoitteesta https://ornisfennica.journal.fi/article/view/133309