pen - a writing implement with a point from which ink flows

point - sharp end; "he stuck the point of the knife into a tree"; "he broke the point of his pencil"

bird - warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

mouth - the externally visible part of the oral cavity on the face and the system of organs surrounding the opening; "she wiped lipstick from her mouth"