What does it take to create a truly international Protected Area? For migratory species that cross national boundaries, there are often key areas that constitute "bottlenecks" where species are highly threatened, often because of habitat loss or lack of protection. . Given that the survival of endangered species depends on conservation of bottleneck areas, should not countries that share these species focus the same effort on international bottleneck sites as they would for other endangered species at home. Often these bottlenecks are located in countries with relatively few resources for effective protection, so is there not scope for creation of truly international protected areas, albeit located on sovereign soil, where resources are directed, particularly from more-developed to less-developed nations. This is very different from a World Heritage site, though some of the principles are similar. But it is protecting literally a shared natural heritage in migratory species
