blue tit nestling bird, cyanistes caeruleus, looking out from bird box about to fledge

animal beak bird birdhouse birdwatching blue bluetit box branch breeding brood caeruleus chick chicks city copyspace cyanistes family feather feathers fledge fledged fledgeling fledging fledgling forest garden great habitat hole house incubation mating moss nature nest nestbox nesting nestling nestlings nurture ornithology outdoors parus passerine plumage songbird spring tit titmouse town tree urban wild wildlife wing wood woodland young