blue tit, cyanistes caeruleus, head through plastic holes on suet garden feeder

animal beak bird birdhouse birds birdwatching blue box branch caeruleus city cyanistes faecal feather fecal feeder flight forest garden great isolated nature nest nestling ornithology outdoors parus passerine plumage poo sac sack sitting song songbird sparrow spring suet tit titmouse tomtit town tree urban wild wildlife wing