"It's unlikely they will defect in large numbers, but we have to try. Hearing familiar voices like mine, and others from North Korea, might impact their psychology," he says.

Tsunami hazard areas can be quite large depending on the location, and in some cases, they are home to large numbers of people.

“The specifics varied but the results were the same: illegal immigrants and even legal migrants left the country “voluntarily” in large numbers.

Mr Syme said there had been an increase in the number of young people identified with neurodiversity and the associated challenges of the school environment such as noise and large numbers of people.

But Mr Chandi points out that there are several other species which nest in the area in large numbers.