Here is verse 28 in The Amplified Bible: “Wherever there is a fallen body (a corpse), there the vultures (or eagles) will flock together.” The birds described here belong to a family known as Old World Vultures, which includes eagles, buzzards, kites, and hawks. When vultures gather to eat a carcass, it is known as a “wake.”
Vultures seldom attack healthy animals, but they have a keen sense for when one is wounded or sick, often killing an unhealthy animal rather than waiting for it to finally succumb. Their digestive systems are so acidic that they can ingest rabies, cholera, botulinum toxin, and even deadly anthrax without harm. They perform a grisly but necessary job in disposing of flesh that would otherwise encourage the spread of disease.
As Christ says, where a carcass is, a wake of vultures is imminent. This tells us little, aside from the fact that it is in response to the disciples' question about the sign of His coming and the end of the age (Matthew 24:3). Combined with the reference to lightning, it implies that His return will be highly visible.
David C. Grabbe
Where the Eagles Are Gathered