It found that since 1970 animal populations had dropped 30 percent , the area covered by mangroves and sea grasses was down 20 percent and the coverage of living corals had fallen 40 percent . Top 11 new species list includes frogfish , golden orb spider , bug-eating slugs . Coincides with International Day of Biodiversity being marked in 10 countries . UNEP says not enough is being done to reduce rate of biodiversity loss . United Nations report found animal populations have dropped 20 percent since 1970 .
Top 11 new species list includes frogfish , golden orb spider , bug-eating slugs . Coincides with International Day of Biodiversity being marked in 10 countries . UNEP says not enough is being done to reduce rate of biodiversity loss . United Nations report found animal populations have dropped 20 percent since 1970 .