Bird (fowl) - Vine's Expository Dictionary of New Testament Words
Bird (fowl)
[ 1,,G3732, orneon ]is probably connected with a word signifying to perceive, to hear;" Revelation 18:2; Revelation 19:17, Revelation 19:21. See FOWL. Cp. ornis, a hen.
[ 2,,G4071, peteinon ]
signifies "that which is able to fly, winged." It is connected with ptenon signifying "feathered, winged," which is used in 1 Corinthians 15:39. Cp. petomai and petaomai, "to fly." In the Gospels the RV always translates it "birds," e.g., Matthew 6:26; but "fowls" in Acts 10:12; Acts 11:6. The AV unsuitably has "fowls," in the Gospels, except Matthew 8:20; Matthew 13:32; Luke 9:58.