Despite their importance, wilderness areas are being destroyed at an alarming rate and need urgent protection.
Rhinos everywhere have lost out to a combination of habitat destruction and poaching.
The mental abilities of these primates continue to surprise even experts.
Andean forests must be added to the growing list of ecosystems that will not respond well to climate change.
Out of 112 tiger conservation areas in 11 tiger-range countries, only 13% meet global standards.
Despite its positive message, a poignant ad, which has gone viral on social media, has been banned on British television.