Psalms 102:7

...Let us not pass over what is said, or even read, of this bird, that is, the pelican; not rashly asserting anything, but yet not passing over what has been left to be read and uttered by those who have written it. Do ye so hear, that if it be true, it may agree; if false, it may not hold. These birds are said to slay their young with blows of their beaks, and for three days to mourn them when slain by themselves in the nest: after which they say the mother wounds herself deeply, and pours forth her blood over her young, bathed in which they recover life. This may be true, it may be false: yet if it be true, see how it agreeth with Him, who gave us life by His blood. It agreeth with Him in that the mother's flesh recalleth to life her young with her blood; it agreeth well. For He calleth Himself a hen brooding over her young. ...If, then, it be so truly, this bird doth closely resemble the flesh of Christ, by whose blood we have been called to life. But how may it agree with Christ, that the bird herself slays her own young? Doth not this agree with it? "I will slay, and I will make alive: I will wound, and I will heal." Would the persecutor Saul have died, unless he were wounded from heaven; or would the preacher be raised up, unless by life given him from His Blood? But let those who have written on the subject see to this; we ought not to allow our understanding of it to rest upon doubtful ground. Let us rather recognise this bird in the wilderness; as the Psalm expresseth it, "A pelican in the solitude." I suppose that Christ born of a Virgin is here meant. He was born in loneliness, because He alone was thus born. After the nativity, we come to His Passion. ...Born in the wilderness, because alone so born; suffering in the darkness of the Jews as it were in night, in their sin, as it were in ruins: what next? […]

I watch,....

In affliction we should sit alone to consider our ways ( Lam. iii. 28 ), but not sit alone to indulge an inordinate grief. He was evil-spoken of by his enemies, and all manner of evil was said against him.

I watch, and am like a sparrow alone upon the house top: I keep a solitary vigil as the lone sentry of my nation; my fellows are too selfish, too careless to care for the beloved land, and so like a bird which sits alone on the housetop, I keep up a sad watch over my country. The Psalmist compared himself to a bird, —a bird when it has lost its mate or its young, or is for some other reason made to mope alone in a solitary place. Probably he did not refer to the cheerful sparrow of our own land, but if he did, the illustration would not be out of place, for the sparrow is happy in company, and if it were alone, the sole one of its species in the neighbourhood, there can be little doubt that it would become very miserable, and sit and pine away. He who has felt himself to be so weak and inconsiderable as to have no more power over his times than a sparrow over a city, has also, when bowed down with despondency concerning the evils of the age, sat himself down in utter wretchedness to lament the ills which he could not heal. Christians of an earnest, watchful kind often find themselves among those who have no sympathy with them; even in the church they look in vain for kindred spirits; then do they persevere in their prayers and labours, but feel themselves to be as lonely as the poor bird which looks from the ridge of the roof, and meets with no friendly greeting from any of its kind.

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.