Sand Martin (Riparia riparia), on breeding wall, Lower Saxony, Germany, Europe

animals in the wild animals animal aves bank swallow bird photography birds bird breeding season breedings breeding time breeding wall breeding breed central europe clay walls clay wall deserted empty europe fauna german federal republic germany habitat hirundinidae incubate incubating lower saxony middle europe natural environments natural environment natural habitat nesting nest nobody no one no people norddeutschland northern germany north germany oscine passeriformes passerines passerine passeri riparia riparia rock faces rock face rocks rocky rock sand martins sand martin songbirds songbird swallows swallow swallow uninhabited walls wall wild animals wild animal wildlife photography wildlife