Pakkala, Timo, Juha Tiainen, Heikki Pakkala, Markus Piha, and Jari Kouki. “Nest Tree Characteristics of the Lesser Spotted Woodpecker (Dendrocopos Minor) in Boreal Forest Landscapes”. Ornis Fennica 96, no. 4 (December 31, 2019): 169–181. Accessed November 21, 2024. https://ornisfennica.journal.fi/article/view/133958.