The second passage occurs in Jer. viii. 7: "Yea, the stork in the heaven knoweth her appointed times; and the turtle, and the crane [sis], and the swallow observe the time of their coming; but my people know not the judgment of the Lord." With regard to this passage, the Jewish Bible renders the word sis as Swallow, though with the mark of doubt.
Allusion is here made to the migratory habits of the Swift. There is, perhaps, no bird more conspicuous in this respect; for whereas the other migratory birds seem to straggle, as it were, into the country, the Swifts arrive almost simultaneously, so that on one day not a Swift will be seen, and on the next the air is full of their dark, glancing forms.
Like the Swallow, the Swift haunts the neighbourhood of man, and loves to build its simple nest in the roofs of houses. Almost any hole will do for a Swift to build in, provided that it be tolerably deep; for the bird loves darkness for its nest, though it is essentially in its habits a bird of light.
Perhaps the word "build" is scarcely the right one, inasmuch as the nest is even more simple than that of the sand-martin. This latter bird does indeed arrange with some regularity the feathers which compose its nest, as may be seen by a beautiful specimen obtained by Mr. Gould; whereas the Swift merely places together a quantity of hay, straw, hair, feathers, and similar materials, all of which are probably obtained from the ruins of a sparrow's nest which had occupied the hole before the Swift took possession of it.
Several species of Swift inhabit Palestine. The common Swift (Cypselus apus), with which we are so familiar, is very plentiful, and so is the Alpine Swift (Cypselus melba), a bird which is rare in England, though it occasionally visits our shores. It is much larger than the common Swift, and is brown above and white below, instead of being dusky black, like the common species.
The most characteristic species is, however, the Galilean Swift (Cypselus affinis). Of this kind, Mr. Tristram remarks that it is "very like the house-martin in general appearance and size. It resides all the year in the Jordan valley, where alone it is found, living in large communities, and has a pleasing note, a gentle and melodious wail, very different from the harsh scream of the other swifts. Its nests are very peculiar, being composed generally of straw and feathers, agglutinated together by the bird's saliva, like those of the edible swallow of Eastern Asia. They are without any lining, attached to the under side of an overhanging rock. It also sometimes takes possession of the nest of the rufus swallow for its purposes. The Galilean swift has a wide range, being found in India and Abyssinia."
It is possible that this may be the Sis mentioned by Hezekiah, its soft wailing cry being used as the metaphor to express his own complaining.
As might be expected, the Talmudical writers have much to say on this bird.
For example, the offering which a leper made at the cleansing of his infirmity might be the Tzippor-deror, the rather quaint reason being that it was a bird with sharp scratching claws, and was therefore very appropriately offered in connexion with a disease of the skin. Here we have rather a complication of terms, the word tzippor being used, as we shall presently see, to signify the sparrow in particular, or any little bird in general. The particular species, therefore, which is signified by the combination of the two words tzippor-deror is rather obscure, and the Talmudists themselves are rather uncertain about it. The interpretation of this compound word seems, however, to have been a difficulty, and the various renderings which have been suggested seem at last to have varied between the wild pigeon, or rock-dove, and the Swallow. An account of the various arguments is given by Lewysohn in his "Zoologie des Talmuds," page 206, and may be briefly epitomized, as follows, in favour of the Swallow, or, as we shall soon see, the Swift.