It is between 18 cm (7.1 in) and 19 cm (7.5 in) long, and weighs between 33.4 g (1.18 oz) and 46.9 g (1.65 oz),[1] with an average of 38.9 g (1.37 oz).[10]:207 It has a thick, heavy bill that is dull black, curves slightly downwards, and is about the same length as the head.[5][19][3][10]:1 The lower mandible is grayish and pale.[3] The tail is long and rounded.[10]:207