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.

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

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

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

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

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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.

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