Vol. 33 (2023)

					View Vol. 33 (2023)

Volume 33 comprises the continuous publishing of open access contributions in Ornis Svecica. The cover (available under the Creative Commons Attribution 4.0 International License) features an adult male Long-tailed Duck Clangula hyemalis in a marine winter landscape, photographed by Frode Falkenberg © (falkefoto.no). This is the focal species of this year's first paper, in which Larsson (2023) presents a method to estimate age and sex ratios among wintering Long-tailed Ducks from photo surveys at sea.

Published: 2023-03-06