Dragons are extraordinarily good mimics, escaping human predation by disguising themselves as common airliners, some even going so far as to sport crude copies of carrier logos. This makes them difficult to track, though most sources agree that the dragon population is critically endangered.
While there has been some success with halting large-scale dragon hunting, conservationists are still concerned about a recent spate of crashes in otherwise healthy adults.
Given that dragons communicate via radio signals and that most crashes occur near military radar stations, it is theorized that the radar may be disorienting the dragons. Investigations are still ongoing.