Weebill

The weebill (Smicrornis brevirostris) is a species of bird in the family Acanthizidae. It is an insectivorous passerine that is found throughout mainland Australia. At 8 to 9 cm (3.1 to 3.5 in) long, it is Australia's smallest bird. It was originally described by John Gould in 1838, and four subspecies are recognised. The weebill's plumage is nondescript, with olive-grey upperparts and paler, more yellowish underparts. It grades from more brownish plumage in the southern regions of Australia to more yellow in tropical areas. == Taxonomy == The weebill was described by John Gould in 1838 as Psilopus brevirostris. The species epithet is derived from the Latin words brevis 'short' and rostrum 'beak'. In 1843, Gould erected the genus Smicrornis for his new species Smicrornis flavescens, collected from Port Essington, noting it as distinct from Gerygone (which had replaced Psilopus as a name). The generic name Smicrornis derives from the Greek smicros 'small' and ornis 'bird'. It is the only member of genus Smicrornis; gene flow is strong and local variation follows Bergmann's and Gloger's rules. Gould initially called it the short-billed smicrornis, but it did not gain acceptance. Other names include tree-tit, short billed tree-tit, scrub-tit, or short-billed scrub-tit.…