Since 2000 Tiwest's Cooljarloo Mine has sponsored the Department of Environment and Conservation (DEC) Western Shield Program.
Incorporating more than 40,000 hectares of bushland from Jurien Bay to Lancelin and across to the Brand Highway, the program involves aerial baiting to control the population of foxes and feral cats that prey upon small native mammals, such as woylies and numbats. These native animals are immune to the poison used in the baiting program, but foxes and cats are not.
Tiwest's annual contribution to the program has assisted several species of Western Australia's small wildlife to recover from the edge of extinction. Native animal species such as tammar wallabies, woylies and western barred bandicoots are now being re-introduced to the area.
In 2005 tammar wallabies equipped with radio collars were re-introduced for the first time into the Nambung National Park (Pinnacles). Prior to the Western Shield program sponsored by Tiwest in this area, the re-introduction of these species would have been impossible.