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.
One of the greatest threats these birds face in the wild is a lack of suitable nesting sites. Together with the help of Scott Ronaldson of the Endangered Wildlife Trust, a number of artificial nests have been erected within the birds ranging area to facilitate nesting. Birds are recognised as good indicator species for biodiversity monitoring and thus monitoring is essential in the long-term preservation of a healthy ecosystem.