The flying water bird appears prominently in portable rock art. Their high fat content makes them a nutritious food item for human foragers.
I was reminded of the predator-prey relationship between raptors and water birds by my next door neighbor who witnessed an American Bald Eagle take a Canada Goose on the lake shore near our homes this summer. There was a significant fight involved. It is possible this avian mega sculpture features the pairing of these two bird types in recognition of this relationship.
The Virginia and Asian flying water bird sculptures are significant because they both include a ground, or water, which serves as a base upon which to present the bird. The bases and the birds are the same piece of stone in both cases. There is a remarkable similarity in the 'tails' of the birds found a "world apart."