However, despite the risks and the fact that Base jumping is illegal in many destinations, more people appear to be taking up the sport – although there are no official figures.
When we asked how likely they were to die if they tried to migrate illegally to their preferred destination, potential illegal migrants reported that they are willing to accept a 25% risk of death at the median.
America is one of the top destinations of illegal ivory from Africa, as well as an important transhipment point for the carved ivory trinkets bound ultimately for the leading markets in China, Japan, Thailand and other Asian countries.
When available, the origin and intended destinations of illegal wildlife products were also collected to aid in the development of proposed wildlife trade routes and hot-spot regions.
The US is the second destination for illegal ivory, after China.
These cities, of course, are also too often the destination for illegal guns flowing in from out of state.
Members of the coast guard found 271 survivors aboard the 50-foot boat when they boarded it less than a mile off the small Italian island of Lampedusa, which lies near the North African coast and is a frequent destination for illegal migrants.
In a speech at the opening of the Convention on International Trade in Endangered Species conference in Bangkok, the prime minister, Yingluck Shinawatra, promised to amend the kingdom's laws, which critics say include loopholes that have allowed smugglers to ferry African tusks to Thai markets and onward, often to China, the world's top destination for illegal ivory.
Because China is the world's biggest destination for illegal ivory, the latest move is even more significant according to CITES secretary-general John Scanlon.
Migration Watch, which campaigns for much tighter restrictions on legal immigration to the UK, said the figures highlighted the fact that the UK was a "very attractive destination" for illegal migrants.
