Where the birds make their nests: as for the stork, the fir trees are her house.
Read Chapter 104
Augustine of Hippo
AD 430
23. "There shall the sparrows build their nests: their leader is the house of the coot" (ver. 17). Where shall the sparrows build? In the cedars of Libanus. ...Who are the sparrows? Sparrows are birds indeed, and fowls of the air, but small fowls are wont to be called sparrows. There are therefore some spiritual ones that build in the cedars of Libanus: that is, there are certain servants of God who hear in the Gospel, "Sell all that thou hast, and give to the poor; and thou shalt have treasure in heaven; and come and follow Me." ...Let him who hath resigned many things, not be proud. We know that Peter was a fisherman: what then could he give up, to follow our Lord? Or his brother Andrew, or John and James the sons of Zebedee, themselves also fishermen; and yet what did they say? "Behold, we have forsaken all, and followed Thee." Our Lord said not to him, Thou hast forgotten thy poverty; what hast thou resigned, that thou shouldest receive the whole world? He, my brethren, who resigne...
Sparrows, or "birds "(Psalm ci. 8.; Haydock) in general. (Berthier)
Highest; or, literally, "the tribe of the heron is their leader "(Haydock) first making their nests. Septuagint seem to have read better than the present Hebrew, "the stork, the fir-trees are its house. "(Berthier)