great tit nest in birdhouse

great tit parus major nest birdhouse clutch 10 eggs incubating removable bird study development egg cavity nesters nesting birds animal atop behavior birdlife body language movement breeding plumage angry chickadee favorite feather feathered garden titmouse oxeye songbird titmice tomtit vigour reproduction wild beast wildlife broad tail yellow laying oviposition incubation hatching hatch