This root form (lemma) is used in 3 different forms in the NT: ὀρνέοις (DNP), ὀρνέου (GNS), ὄρνεα (NNP).
It is glossed in 2 different ways: ‘bird’, ‘birds’.
OET REV 18:2 Greek word=ὀρνέου (orneou) Morphology=GNS English gloss=‘bird’ SR GNT REV 18:2 word 29
OET REV 19:17 Greek word=ὀρνέοις (orneois) Morphology=DNP English gloss=‘birds’ SR GNT REV 19:17 word 18
OET REV 19:21 Greek word=ὄρνεα (ornea) Morphology=NNP English gloss=‘birds’ SR GNT REV 19:21 word 23