This photo moved me. A few passages of Scripture come to mind:

“If you come across a bird’s nest in any tree or on the ground, with young ones or eggs and the mother sitting on the young or on the eggs, you shall not take the mother with the young.” (Deuteronomy 22:6)

“He [the LORD] encircled him [Israel], he cared for him,
he kept him as the apple of his eye.
Like an eagle that stirs up its nest,
that flutters over its young,
spreading out its wings, catching them,
bearing them on its pinions.”   
(Deuteronomy 32:10-11)

“Like birds hovering, so the LORD of hosts will protect Jerusalem; he will protect and deliver it.” (Isaiah 31:5)