Blackish-grey Antshrike

The blackish-grey antshrike (Thamnophilus nigrocinereus) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Brazil, Colombia, French Guiana and Venezuela. == Taxonomy and systematics == The blackish-grey antshrike was described by the English zoologist Philip Sclater in 1855 and given the binomial name Thamnophilus nigrocinereus. It has these five subspecies: T. n. cinereoniger Pelzeln, 1868 T. n. kulczynskii (Domaniewski & Stolzmann, 1922) T. n. nigrocinereus Sclater, PL, 1855 T. n. tschudii Pelzeln, 1868 T. n. huberi Snethlage, E, 1907 Some authors treated Castelnau's antshrike (T. cryptoleucus) as a subspecies of the blackish-grey antshrike, but that approach was not widely accepted. They are now considered sister species. Some authors suggest that some of the current subspecies might be better treated as species. == Description == The blackish-grey antshrike is 15 to 17 cm (5.9 to 6.7 in) long and weighs 28 to 32 g (0.99 to 1.1 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 sexual dimorphism. Adult males of the nominate subspecies T. n. nigrocinereus are generally blackish gray. Their crown is…