Explanation:

• “Silent Extinction” is associated with the plight of giraffes.
• A dramatic drop in giraffe populations over the past 30 years has seen the world's tallest land mammal classified as vulnerable to extinction.
• Numbers have gone from around 155,000 in 1985 to 97,000 in 2015 according to the International Union for the Conservation of Nature (IUCN).
• The iconic animal has declined because of habitat loss, poaching and civil unrest in many parts of Africa.
• Some populations are growing, mainly in southern parts of the continent.
• Until now, the conservation status of giraffes was considered of "least concern" by the IUCN.