The plight of Speke's gazelle, Facing extinction

The Speaks gazelle, native to the Horn of Africa, is an endangered species known for its distinctive nose that can puff up when excited. Once abundant in Ethiopia and Somalia, its population has drastically declined due to hunting, drought, and overgrazing. The gazelle inhabits semi-desert grasslands and feeds on various plants. Conservation efforts are crucial to prevent its extinction.

What unique feature does the Speaks gazelle have when it is excited?

How has the population of the Speaks gazelle changed from the 1980s to today?