Tree sap as an important seasonal food resource for woodpeckers : the case of the Eurasian three-toed woodpecker ( Picoides tridactylus ) in southern Finland

Autor:	Pakkala, Timo, Piiroinen, Jarmo, Lakka, Johanna, Tiainen, Juha, Piha, Markus, Kouki, Jari
Zdroj:	Annales Zoologici Fennici, 2018 Mar 01. 55(1/3), 79-92.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/26789692 Zobrazit plný text záznamu