Over the years, a substantial database has been compiled which illustrates the bird diversity that exists within the GMPGR. This is invaluable in the managing of endangered species e.g. Ground hornbills and Lappet-faced vultures. The monitoring has revealed that a resident group of Ground hornbills continue to forage on GMPGR, and have successfully nested and fledged two chicks in the last 3 years. Sadly, the last chick to be fledged is not present with the group in early 2009 and is presumed to have died. However, the birds have produced a healthy chick in the 2008/2009 season. The birds have used the same nest for a number of years.