The appeal to the regularity of animal instincts reminds us of Isaiah 1:3. Yea, the stork, etc. The minatory birds obey their instinct with the most unfailing regularity. Those referred to are:
(3 and 4) the crane and the swallow, or rather, "the swift and the crane." These birds are again mentioned together in Isaiah 38:14 (the psalm of Hezekiah), where special reference is made to the penetrating quality of their note. "The whooping or trumpeting of the crane rings through the night air in spring, and the vast flocks which we noticed passing north near Beersheba were a wonderful sight." The introduction of the swallow in the Authorized Version is misleading, as that bird is not a regular migrant in Palestine. The note of the swift is a shrill scream. "No bird is more conspicuous by the suddenness of its return than the swift," is the remark of Canon Tristram, who saw large flocks passing northwards over Jerusalem, on the 12th of February. It is an interesting fact that the swift bears the same name (sus) in the vernacular Arabic as in the Hebrew of Jeremiah. The judgment; better, the law (see on Jeremiah 5:4).