Unrangeable

Song learning enables singers to one-up listeners under certain circumstances that favor unrangeable songs. Territorial instability will generate selection that favors singers whose locations are not always rangeable, those with songs not in the memories of listeners.

And then out of the mist, unrangeable, unreachable, the onagers started firing.

Clearly the feasibility of this idea rests on an ability to sing unrangeable songs, or songs that give incorrect range information (e.g. Morton 1986).