Revelation 19:17
Then I saw an angel standing in the sun, and he called out in a loud voice to all the birds that fly in midair, "Come and be assembled together for the great supper of God,
Revelation 19:21
Then the rest of them [i.e., the kings and their armies. Verse 19] were killed with the sword that came out of the mouth of the One riding the horse. And all the birds gorged on their flesh.
Revelation 8:13
And as I looked, I heard an eagle flying in midair, saying in a loud voice, "It is bad, very bad, awful bad for those people who live on earth, because of the sound of the trumpets of the remaining three angels!" [i.e., because of the messages they will deliver].
Revelation 14:6
Then I saw another angel flying in mid heaven. He had eternal good news to proclaim to those who lived on the earth, and to every nation, tribe, language group and race.