![Haggard Hawks 🦅 on Twitter: Haggard Hawks 🦅 on Twitter:](https://pbs.twimg.com/media/D_L_nRUWwAAZDKu.jpg)
Haggard Hawks 🦅 on Twitter: "Because all swans were once presumed to be white, the Roman poet Juvenal used the expression BLACK SWAN to describe something unbelievable, or so fabulous as to
QI - Quite Interesting - Until they were discovered in Australia, a "black swan" was used to describe something that couldn't possibly exist. | Facebook
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