Rufous-capped Antshrike

The rufous-capped antshrike is 15 to 17 cm (5.9 to 6.7 in) long and weighs 16.3 to 25 g (0.57 to 0.88 oz). Members of genus Thamnophilus are largish members of the antbird family; all have stout bills with a hook like those of true shrikes. This species exhibits significant sexual dimorphism. Adult males of the nominate subspecies T. r. ruficapillus have a chestnut crown and a buffy gray face and throat with faint dusky mottling and bars. Their upperparts are dark brown. Their wings are rufous-brown. Their tail is brownish black with white tips and bars on the inner webs of the outer feathers. Voice: The rufous-capped antshrike's song apparently has some regional variations that have not been studied. It has been described as a "slightly accelerating series of 12-15 'tjew' notes". It has been written as "wah, nyah, nyah-nyah-nya-nya-nya'nya-arr" and as "weepweepweepweepweepweepeepeepeep".