Heb. sis ( Isaiah 38:14 ; Jeremiah 8:7 ), the Arabic for the swift, which "is a regular migrant, returning in myriads every spring, and so suddenly that while one day not a swift can be seen in the country, on the next they have overspread the whole land, and fill the air with their shrill cry." The swift (cypselus) is ordinarily classed with the swallow, which it resembles in its flight, habits, and migration.
Heb. deror, i.e., "the bird of freedom" ( Psalms 84:3 ; Proverbs 26:2 ), properly rendered swallow, distinguished for its swiftness of flight, its love of freedom, and the impossibility of retaining it in captivity. In Isaiah 38:14 and Jeremiah 8:7 the word thus rendered ('augr) properly means "crane" (as in the RSV).
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
[N] indicates this entry was also found in Nave's Topical Bible [S] indicates this entry was also found in Smith's Bible Dictionary Bibliography InformationEaston, Matthew George. "Entry for Swallow". "Easton's Bible Dictionary". .