The scales are estimated to have come from at least 20,000 to 30,000 slaughtered pangolins in Africa.
The 44-year-old rhino, Sudan, and his last two female companions are unable to breed naturally because of issues that include old age, casting the fate of the species even more into doubt.
To counter a low birth rate, Polish viewers were told in a special YouTube video produced by the Ministry of Health, “If you ever want to be a parent, follow the example of rabbits.”
Acting on a tip Thai authorities seized the smuggled pangolins and 450 kg (992 lb) of scales which entered Thailand from Malaysia.
The scales of the endangered pangolin, the world's most heavily-trafficked mammal, are highly prized in some parts of Asia and Africa. This is the second time Malaysian authorities seized such a large amount of pangolin scales in three days.
Pangolins are considered the most trafficked animal in the world and its scales are highly prized in some countries for their unproven medicinal properties.
More than 300 pilot whales have been killed after being stranded on a beach as rescuers desperately try to keep more from coming onshore.
Rescuers tried to help more than a hundred mammals return to sea but many got stranded again. It is relatively common for whales to get stranded on the country's beaches.
In the five years leading up to 2014, 60 percent of Tanzania's elephants were slaughtered for their tusks.
A newly released report addresses the drop in the number of elephants throughout the continent, mainly due to poaching.
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