Hudson's black tyrant explained

Hudson's black tyrant (Knipolegus hudsoni) is a species of bird in the family Tyrannidae. It is named after Argentine-British ornithologist William Henry Hudson.^[1] It breeds in central Argentina and winters northwards, reaching Bolivia and Paraguay.

Notes and References

1. Hudson . W. H. . Sclater . P. L. . 1872 . On the Birds of the Rio Negro of Patagonia . Proceedings of the Zoological Society of London . 40 . 1 . 534–550 [541-542], pl. 31 . 10.1111/j.1469-7998.1872.tb00492.x . 0370-2774 . Biodiversity Heritage Library.