wild animals and all livestock small creatures and flying birds

Beasts, and all cattle creeping things, and flying fowl

Ah, the land of the rustling of wings, which is beyond the rivers of Ethiopia

Woe to the land shadowing with wings, which is beyond the rivers of Ethiopia

And if you go over the next 15 years or so to a blended wing body, kind of a flying wing with internal engines, then you get about a factor three efficiency improvement at comparable or lower cost.