The small but thriving population of rock wallabies in Kalbarri National Park has received a further boost, with 25 more wallabies introduced into the park this week.

The third and final translocation of the species into the park over three years, brings the number of radio-collared wallabies, introduced from Wheatbelt reserves and Cape Range National Park, in the Pilbara to 72.

Black flanked rock wallabies were considered extinct from Kalbarri National Park for 20 years, until two wallabies were filmed in a gorge in 2015.

The translocation is a collaboration between the Department of Biodiversity, Conservation and Attractions (DBCA) and WWF Australia.

Two-hundred and nineteen native animals have been recovered from an alleged smuggling operation after being discovered in a vehicle near Eucla, 1200km east of Perth. This is the largest seizure of native animals ever undertaken in WA.

WA Police Force intercepted the speeding vehicle on Eyre Highway, 20m west of Mundrabilla and discovered 15 large bags and around 15 plastic containers and bottles housing 198 reptiles, of which 58 are venomous, 16 marsupials, three cockroaches and two spiders.

WA Police Force seized the animals and handed them to the Parks and Wildlife Service for identification, a health assessment and holding. The animals are being assessed by vets at Perth Zoo.

• Youth-based conservation and education program, Bush Rangers WA, celebrates milestone.

• Bush Rangers has the highest participation of Aboriginal students, female students and students with disability of any Cadets WA program.

Western Australia's biggest cadets program, Bush Rangers WA, has celebrated its 20th year.

Attending the annual Bush Rangers conference today in Perth, Environment Minister Stephen Dawson commended the program that encourages secondary school students to develop practical nature conservation skills and contribute to their local community.

Since its inception in 1998, the program has seen more than 18,500 young people take part, contributing 1.9 million volunteer hours to conservation and community projects.

There are currently 67 cadet units around the State from Kununurra to Esperance, comprising of more than 3200 secondary school students. Students take part in regular camps where they carry out planting, fencing or weeding; as well as adventurous activities including abseiling, swimming with whale sharks, and rock climbing.

Bush Rangers is coordinated by the Department of Biodiversity, Conservation and Attractions and is part of the broader Cadets WA initiative, supported by the Department of Communities.