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> Some operators claimed to be able to discriminate breeds It's well known that experts can distinguish the African Swallow from the European Swallow simply by

> Some operators claimed to be able to discriminate breeds It's well known that experts can distinguish the African Swallow from the European Swallow simply by airspeed.

schoen 9y ago
Plus, they can determine whether the bird is carrying a payload.
- kwelstr 9y ago
  Guard: Are you suggesting that coconuts migrate? Arthur: Not at all! They could be carried.