The "leucistic" Gull again


For second year this partly leucistic male Heuglin's Gull (Larus heuglini heuglini or Larus fuscus heuglini) is at the harbour of Herakleion. But,unlikely the other members of its taxon, about 10 birds at least that are around the harbour, this individual is found always at the same location in the harbour and not with the other Gulls. I wonder if this behaviour is likely to found in cases of odd individuals like albinos. Or something else?