The angelic being in this verse is also seen in the Re:4 temple scene, it was 'their seed' that created the 3 strains of flesh that is not man.

Eze:10:14:
And every one had four faces:
the first face was the face of a cherub,
and the second face was the face of a man,
and the third the face of a lion,
and the fourth the face of an eagle.

1Co:15:39:
All flesh is not the same flesh:
but there is one kind of flesh of men,
another flesh of beasts,
another of fishes,
and another of birds.