great tit nest in birdhouse

angry animal atop beast behavior bird birdhouse birdlife birds body breeding broad cavity chickadee chicks clutch cover development dog egg eggs favorite feather feathered focus garden great hair hamlet hatch hatching incubating incubation language laying major material moss movement nest nesters nesting order oviposition oxeye parus plumage removable reproduction songbird study tail tit titmice titmouse tomtit vigour wild wildlife yellow