The Torah describes God bearing Israel "on eagles' wings" (Exodus 19:4), and the Mekhilta asks a pointed question: why an eagle? What makes the eagle different from every other bird?
The answer reveals a profound insight about divine protection. All other birds carry their young beneath them, gripped in their talons or tucked under their bodies. They do this because their greatest threat comes from above — predatory birds that swoop down to snatch their chicks. By keeping their young underneath, these birds use their own bodies as shields against aerial attack.
The eagle operates by entirely different logic. No bird of prey flies higher than the eagle, so the eagle has nothing to fear from above. Its only predator is the human hunter on the ground, who might shoot an arrow upward. Faced with this threat, the eagle makes a remarkable calculation: it places its young on top of its wings, above its own body. If an arrow comes from below, the eagle reasons, better that it strike me than my child.
This is the image the Torah chose to describe God's relationship with Israel during the Exodus. God did not merely transport the people out of Egypt. He positioned them above Himself, absorbing every blow that came from below so that His children would remain unharmed. The plagues, the splitting of the sea, the destruction of Pharaoh's army — in each case, God placed Himself between Israel and danger.
The metaphor is deliberately chosen to be unlike any other bird. God's protection is not defensive. It is sacrificial.