He was a co-author of an international 2008 report that says a quarter of the 5,487 wild mammal species on the planet are threatened with extinction, and half of all mammal populations are declining.

Conservation efforts targeting most vulnerable birds cut extinction rate by 40%, according to scientists. CBC News · Posted: Dec 27, 2019 9:59 PM EST | Last Updated: December 28, 2019.

The report, published in the journal Nature on Thursday, questions the validity of several high-profile reports on extinction, including one that forecast climate change will commit up to 35 per ...

That generated much smaller extinction rates, suggesting the traditional method produces overestimates on the order of 40 to 160 per cent. "Those numbers are very questionable," He said.

Research suggests extinction rate has been accelerated by human activities, particularly in the last 200 years; Co-author of new study warns: ‘we’re losing things so fast, that for us it ...