“I was now in hopes that I had made the little orphan quite happy; and so it seemed for some time, until it began to remember its lost parent…” — Alfred Russel Wallace, The Malay Archipelago (1869)

“The change from plants to animals…is gradual… For a person might question to which of these classes some marine objects belong…” — Aristotle, History of Animals (c. 350 BCE)

“At Port St. Julian these great petrels were seen killing and devouring young gulls.” — Charles Darwin, The Voyage of the Beagle (1839)