The Akrotiri Swallows
A reconstruction of the fresco found in the Room of the Lilies in Akrotiri, Santorini. A vision of Theran spring--lilies growing among volcanic rocks, and two swallows cavorting above--before the eruption completely sterilized the island.
Swallows are common in Crete and all around the Cyclades, except for Santorini. From the Theran Spring fresco, it's clear they once inhabited the island; the 1600 B.C. eruption must have been so massive that it must have imprinted "DANGER! AVOID!" on all subsequent swallow generations.