sentences:  The pressures to their habitats over the past 200 years had caused the two species to become extinct on the main land.At the time of reintroduction there were only about 250 "L. hirsutus" in captivity.The project group decided to translocate 34 wallabies into an area, which would give useful information about future reintroductions, in the Shark Bay area of the Peron Peninsula.