This cross has hopefully preserved as much genetic variation as possible for the future of the breed. The entire captive NGSD population, estimated in 1995 to be approximately 300 animals, has thus descended from only eight wild caught founders. Efforts to capture additional wild dogs in the New Guinea highlands have so far proved futile. Droppings and tracks have been seen and howls heard, so hope remains that the gene pool will be expanded when the resources become available to finance the hunt for additional wild breeding stock. NGSD differ from man-made breeds of dog in several ways.
NGSD eyes seem to be more light reflective than domestic dogs', shining bright green in low light.
Modern breeds average two heats per year that are not dependent upon environmental cues. Although there have not been enough independent observations to confirm them, the NGSD also appears to have some behaviors that differ from that of wolves and dogs. The entire body is lowered and an intent, staring gaze is directed toward the playmate being solicited. Although in general their vocalizations are similar to the Dingo and Basenji, the NGSD howl is unique. It has been likened to a bird's call or the song of a Humpback whale.