nest box with the number 877 in the biederitzer busch, a forest area near magdeburg

877 alluvial animal area aviary biederitzer bird birdhouse birdhouses birds box boxes breed breeding brood brooding broody busch conservation design diversity environment fauna floodplain forest garden germany home label lore magdeburg nature nest nesting number ornithology period protection season sign singing songbird species spring springtime tree watching welfare wildlife wood wooden