Sudan was the last male of the northern white rhino subspecies
There are now only two individuals of this rhino subspecies left.
Science writer Stuart Blackman answers your wild question.
The preferred tusk is often more worn
BBC Wildlife writer Sarah McPherson answers your wild question.
Rock Ptarmigan
Clare Kines photographs his local wildlife in the Canadian High Arctic.
Badgers may attack and kill hedgehogs, but that doesn't mean they are solely to blame for the latter's decline, says Carly Pettett. 
Grey seals in the snow at Donna Nook
How grey seals deal with stress depends on their personality, discovers the BBC's Chris Howard. 
Brown rats at Karbu Mata temple, known as the Temple of Rats
BBC Wildlife contributor Amy-Jane Beer answers your wild question. 
Sex and rank makes all the difference in the complex lives of these African carnivores.
African wild dogs
Zoologist Daniella Rabaiotti explains how African wild dogs tackle their prey. 
BBC Wildlife contributor Christian Dunn answers your wild question.
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