From that time on , the fear that it might be extinct gradually grew into near-certainty after the swamps and wetlands in LOCATION@1 around LOCATION@2 in south-west LOCATION@3 were drained for farming in the early NUMBER@1 .

It was thought the species was extinct , because its habitat around LOCATION@2 in south-west LOCATION@3 was cleared for farming in the early NUMBER@1 .
