// Disable warning messages 4507 and 4034. #pragma warning( disable : 4507 34 ) // Issue warning 4385 only once. #pragma warning( once : 4385 ) // Report warning 4164 as an error. The compiler adds 4000 to any warning number that is between 0 and 999.
1 These experts calculate that between 0.01 and 0.1% of all species will become extinct each year.  If the low estimate of the number of species out there is true - i.e. that there are around 2 million different species on our planet** - then that means between 200 and 2,000 extinctions occur every year.
The background level of extinction known from the fossil record is about one species per million species per year, or between 10 and 100 species per year (counting all organisms such as insects, bacteria, and fungi, not just the large vertebrates we are most familiar with).