The population of this species has successfully been maintained at over 50 mature individuals since 1993, and over 250 since 1996. However, it has a very small range concentrated in just a few locations, and remains threatened by a continuing decline in the quality of suitable habitat. For these reasons, the species is still listed as Endangered. It seems doubtful that present populations could be maintained without the current intense management programme and, were management to cease, this species would stand a high risk of extinction.