The Black Swan: The Impact of the Highly Improbable · chapter 1 · id the-black-swan-c1-01-before-the-discovery-of-austra
“Before the discovery of Australia, Europeans were convinced that all swans were white, an unassailable belief confirmed by centuries of empirical evidence. The sighting of the first black swan in Australia invalidated centuries of observation.”
holdsconfidence: high⚠ extracted by pipeline, re-audit pending
Receipts
John Latham, Index Ornithologicus (1790)paywalled — manual check queued
Cygnus atratus first described by Latham in 1790 from specimens collected in New Holland (Australia).
Juvenal, Satire VI (c. 100 AD)source alive
Juvenal wrote 'rara avis in terris nigroque simillima cygno' ('a rare bird in the lands, very much like a black swan') -- using black swan as a metaphor for impossibility.
Western Australian MuseumFLAGGED: dead link (503)
Willem de Vlamingh's expedition to the Swan River in 1697 is the first confirmed European sighting of black swans, predating formal scientific description.
This claim is a stable, citable object. If you can falsify a verdict, tell us — corrections are loud here.