A post-mortem examination conducted by the Cetacean Strandings Investigation Programme suggests the animal was killed deliberately.
The duke dismissed the idea that environmental damage is a necessary by-product of economic growth.
Botswana has the largest elephant population on the continent and has traditionally been seen as a safe haven for the animals. However, poaching appears to be rapidly increasing.
Plant extinctions endanger other organisms, ecosystems and the ability of humans to survive on our planet.
Get up close and personal with endangered pachyderms at these ethical elephant sanctuaries.
Researchers predict that the average total body mass of mammals will drop by 25 percent over the next century.
"At restaurant tonight waitress asks if we want straws. Says she has to ask now in fear of THE STRAW POLICE," Nunes tweeted to his 380,000 followers.
Today some 500,000 bison have been restored in over 6,000 locations.
Sometimes his royal highness even leaves nuts for squirrels in his jacket pockets.
Last month China announced it would allow the use of rhino and tiger products under certain circumstances.
Pando is a unique "forest of one tree" covering some 106 acres of the Fishlake National Forest in Utah.
"Killer whale populations found in the most polluted seas around Japan, Brazil, the U.K. or in the northeast Pacific, the authors report, are tending toward complete collapse."
Falkland Islands trade minister Teslyn Barkman said the British government must implement a "no penguins left behind" strategy.
Little is known about the world's second largest shark.
Nearly every species of lemur is increasingly threatened by illegal hunting and climate change in Madagascar, the only country where lemurs are naturally found.
Newly released documents show Donald Trump's golf course that opened in Scotland in 2012 "partially destroyed" a nature conservation considered essential to the entire area's ecosystem.
The last surviving male died in March this year.
OR-7 has inspired activists worldwide. His 17 pups have moved across Southern Oregon and Northern California. Unwittingly, he has done more for his species than any other wolf.
The Chinese giant salamander is capable of growing up to 5.9 feet in length.
A new Republican piece of legislation will threaten about 58.5 million acres, or 91,000 square miles, of protected forest land according to environmental rights activists.
Large predators hunting in habitats where humans pushed them out are no longer anomalous, according to scientists.
Cataloguing the genetic data of 1.5 million known species will take 10 years, cost approximately $4.7 billion and require the cooperation of scientists, governments and students from around the world.