Linnaeus, even in his latest publication, placed it in the genus Hirundo; but the interleaved and annotated copies of his Systema naturae in the Linnean Society's library show the species marked for separation and insertion in the Order Grallae - Pratincola trachelia being the name by which he had meant to designate it in any future edition.
2 Linnaeus's diagnosis of his Sterna hirundo points to his having had an " arctic " tern before him; but it is certain that he did not suspect that specific appellation (already used by other writers for the " common " tern) to cover a second species.
Undoubtedly " hirundo " has now been used so indiscriminately for one species or the other as to cause confusion, which is perhaps best avoided by adopting the epithets of Naumann (Isis, 1819, pp. 1847, 1848), who, acting on and confirming the discovery of Nitzsch (who first detected the specific differences), called the southern species S.
Ducks and geese frequent it in the spring and fall, the white-bellied swallows (Hirundo bicolor) skim over it, and the peetweets (Totanus macularius) "teeter" along its stony shores all summer.