As a sparrow alone - צפור tsippor, seems to be often used for any small bird, such as the swallow, sparrow, or the like. Bochart supposes the screech owl is intended.

watch

Psalm 22:2 O my God, I cry in the day time, but you hear not; and in the night season, and am not silent.

Psalm 77:4 You hold my eyes waking: I am so troubled that I cannot speak.

Psalm 130:6 My soul waits for the Lord more than they that watch for the morning: I say, more than they that watch for the morning.

Deuteronomy 28:66,67 And your life shall hang in doubt before you; and you shall fear day and night, and shall have none assurance of your life...

Job 7:13-16 When I say, My bed shall comfort me, my couch shall ease my complaints...

Mark 14:33-37 And he takes with him Peter and James and John, and began to be sore amazed, and to be very heavy...

alone

Psalm 38:11 My lovers and my friends stand aloof from my sore; and my kinsmen stand afar off.

Lamentations 3:28-30 He sits alone and keeps silence, because he has borne it on him...

The Never Changing One.
"JESUS Christ the same yesterday, and to-day and forever" (Heb. xiii:8). Blessed truth and precious assurance for us poor, weak creatures, yea, among all His creatures the most changing; He changeth not. "For I am the Lord, I change not" (Mal. iii:6). "Of old hast Thou laid the foundation of the earth, and the heavens are the work of Thy hands. They shall all perish, but Thou shalt endure: yea all of them shall wax old like a garment, as a vesture shalt Thou change them, and they shall be changed; …
Arno Gaebelein—The Lord of Glory

Characters and Names of Messiah
For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace. S uch was the triumphant exultation of the Old Testament Church! Their noblest hopes were founded upon the promise of MESSIAH; their most sublime songs were derived from the prospect of His Advent. By faith, which is the substance of things hoped for, they considered the gracious declarations …
John Newton—Messiah Vol. 1

Covenanting Predicted in Prophecy.
The fact of Covenanting, under the Old Testament dispensations, being approved of God, gives a proof that it was proper then, which is accompanied by the voice of prophecy, affording evidence that even in periods then future it should no less be proper. The argument for the service that is afforded by prophecy is peculiar, and, though corresponding with evidence from other sources, is independent. Because that God willed to make known truth through his servants the prophets, we should receive it …
John Cunningham—The Ordinance of Covenanting