Kinglet Manakin

The kinglet manakin or eastern striped manakin (Machaeropterus regulus) is a small South American species of passerine bird in the manakin family Pipridae. It is endemic to Brazil. == Taxonomy and systematics == The kinglet manakin was originally described by the German zoologist Carl Wilhelm Hahn in 1819 and given the binomial name Pipra regulus. The species is now placed in the genus Machaeropterus that was introduced by the French naturalist Charles Lucien Bonaparte in 1854. The five subspecies of what is now the striolated manakin (M. striolatus) were long treated as subspecies of M. regulus with the English name "striped manakin". Following several studies published beginning in 1999, taxonomic systems began separating M. striolatus from M. regulus with the respective English names "western" and "eastern" striped manakin. By 2018 systems were using the current English names "striolated" and "kinglet" manakin. The kinglet manakin is monotypic. == Description == The kinglet manakin is 9 to 10.3 cm (3.5 to 4.1 in) long and weighs 6.4 to 12.5 g (0.23 to 0.44 oz). The species is sexually dimorphic. Adult males have a bright red forehead, crown, and nape. The rest of their face is a grayish olive-green. Their upperparts and tail…