Since Hawaii is an island the introduction of new species can completely decimate an entire ecosystem. Which is exactly what happened when William Herbert Purvis introduced the mongoose to the islands. Contributing to Hawaii becoming the extinction capita...

The 'banded brothers' family of mongooses own the best territory in Uganda's Queen Elizabeth National Park, but other mongoose mobs want a piece of the action. To keep hold of their patch, the banded's need to be a big, strong group, and a regular supply...