Some people who study insects think there may be as many as 100 million species out there.

Every expedition that goes into a place that hasn't been examined before finds new species.

The implication of not knowing exactly how many species there are is that we can't tell if we are actually making progress on the 2010 target.

The border controls that used to be available are now only at the port of entry.

In general terms, I think with increasing human populations we will inevitably see an increase in conflict between humans and wildlife.

What we can measure is how hard we are trying. Measures of effort may be a more useful indicator than estimated rates of species loss. For example, we can measure the number of new protected areas being established and ask if they have sufficient budgets.