The "Marvellous Things Heard", an ancient compilation of surprising things, attributed in the tradition to Aristotle but certainly much later, says (Mir Ausc. 90)

Some of the Ligurians are said to use the sling so well that, when they see a number of birds, they discuss with each other which each of them shall prepare to hit, on the assumption that they will easily get them all.

-- I wonder if it doesn't in fact quote the geographer Poseidonios (C1nd BCE), who travelled to Liguria and who says something rather similar to the bit just after the Ligurian slingers (Ligurian women working after childbirth).