Northern Hawk Owl (Surnia ulula), Saxony, Germany  -  Werner Oppermann/ BIA
00575984
Werner Oppermann/ BIA / Northern Hawk Owl (Surnia ulula), Saxony, Germany
Short-toed Tree-Creeper (Certhia brachydactyla) calling, Lower Saxony, Germany  -  Werner Oppermann
00528163
Werner Oppermann / Short-toed Tree-Creeper (Certhia brachydactyla) calling, Lower Saxony, Germany
Barn Swallow (Hirundo rustica) calling, Mecklenburg Vorpommern, Germany  -  Werner Oppermann
00528161
Werner Oppermann / Barn Swallow (Hirundo rustica) calling, Mecklenburg Vorpommern, Germany
Common Whitethroat (Sylvia communis) singing, Lower Saxony, Germany  -  Werner Oppermann
00528160
Werner Oppermann / Common Whitethroat (Sylvia communis) singing, Lower Saxony, Germany
European Goldfinch (Carduelis carduelis), Lower Saxony, Germany  -  Werner Oppermann/ BIA
00575743
Werner Oppermann/ BIA / European Goldfinch (Carduelis carduelis), Lower Saxony, Germany