Birds that appear outside their normal range are known as vagrants. This post summarizes up to date published sight records of vagrants of the family Passeridae (Sparrows & allies) in Sri Lanka.
Chestnut-shouldered Petronia[Yellow-throated Sparrow] (Petronia xanthocollis xanthocollis)
Legge procured two specimens from a considerable flock in company with a number of Weaver birds, on some openly-wooded grass-land near the sea, close to Madampe while on a trip to Chilaw in October 1876. It is the only record hitherto of this species in Sri Lanka (Legge 1880: 783).
Legge V., 1880. A History of the birds of Ceylon 1983 second edition.