Eze 39:17 And, thou son of man, thus saith the Lord GOD; Speak unto every feathered fowl, and to every beast of the field, Assemble yourselves, and come; gather yourselves on every side to my sacrifice that I do sacrifice for you, even a great sacrifice upon the mountains of Israel, that ye may eat flesh, and drink blood.
This is a prophesy of Christís invitation to the gentiles for salvation.
So we can see that these beasts and these fowls of the air are acceptable to the Lord.
We know that Jesus came to invite the gentiles to salvation with His blood sacrifice on the cross. , so we know that that the fowl of the air and the beasts of the field are God's other creation.
This word feathered comes from the Hebrew word
From ; an edge or extremity; specifically (of a bird or army)
So already this gives us a clue that it may not be reffering to birds but possibly people.