Fig. 5
Example of an aerial photo used for nest counts. Monospecific colony with 25 nests of Grey Herons at egg hatching stage, on trees (Alder Alnus glutinosa).
Fig. 5 | Scientific Data
Example of an aerial photo used for nest counts. Monospecific colony with 25 nests of Grey Herons at egg hatching stage, on trees (Alder Alnus glutinosa).
