 The Sind sparrow was first formally described by Edward Blyth , from a specimen collected by Alexander Burnes at Bahawalpur in around 1840 . Blyth 's description was published in an issue of the Journal of the Asiatic Society of Bengal which , although dated 1844 , was published only in 1845 . It was not recorded until 36 years later , despite the efforts of noted ornithologists Allan Octavian Hume in Sindh and William Thomas Blanford in eastern Iran . This was probably because of its general similarity to the house sparrow , though additionally , Blyth 's description of the species incorrectly described its rump feathers as maroon , and a description by Thomas C. Jerdon contained similar errors . Commenting on his unsuccessful search , Hume wrote that the hundreds of house sparrows he killed in pursuit of the Sind sparrow " ought to form a heavy load " on Blyth 's conscience , and that if the Sind sparrow existed " it would be only decent for it ... to put on an appearance with as little delay as possible " . Hume doubted its distinction , as did other ornithologists . The Sind sparrow was rediscovered by Scrope <unk> Doig in 1880 , in the Eastern Nara district . Ernst Hartert considered it a subspecies of the house sparrow , Passer domesticus pyrrhonotus , in his Die <unk> der <unk> Fauna , but Doig and Claud Ticehurst both found that the two species bred in the same areas without interbreeding . 
