And furthermore: the Shekhinah, from the aspect of the throne, is called ‘eagle’. And from the aspect of ‘youth’ [Var. ḥayah∞‘living-being’ ], a ‘dove’, and from the aspect of ophan, a ‘bird’, and of the Shekhinah: (Ez. 1:5)... they had the image of a human.
And furthermore: (Deut. 22:7) You shall surely send... Come and see: There is an angel appointed over birds – which are souls that are called ‘birds’ – and Sandalphon is its name. And when Israel fulfils this commandment of sending the nest, and Mother goes wandering, and the children cry out, it the angel instructs merit over its birds, and it says to the blessed Holy One: ‘And yet it is written of You: (Ps. 145:9)... and His mercy is upon all His works – so why have You decreed of this bird, that it should be driven from its nest?’