v6 Avian Carriers?

RFC1149 says:

   Avian carriers can provide high delay, low throughput, and low
   altitude service. The connection topology is limited to a single
   point-to-point path for each carrier, used with standard carriers,
   but many carriers can be used without significant interference with
   each other, outside of early spring. This is because of the 3D ether
   space available to the carriers, in contrast to the 1D ether used by
   IEEE802.3. The carriers have an intrinsic collision avoidance
   system, which increases availability.

The carriers are also (over time) self-regenerating in case one gets lost or
corrupted due to collision or interception...