Addax

Kingdom: Animalia

Phylum: Chordata

Class: Mammalia

Order: Artiodactyla

Family: Bovidea

Subfamily: hippotraginea

Genus: Addax

 Species: A. nasomaculatus

 The addax live in Sahara desert they have body length between 1.5 to 1.7, Their body are brown, grey in winter but sandy in summer. they have long twisted horns about 80 cm long, addax have broad hooves with strong dews to help them in walking on sand their head is marked with brown or black patches that form an 'X' over their noses.

addax are active at night sometimes as the spend their days at that time, during the birth the female can leave the group with her male sometimes. Addax diet is about grasses as they need to drink to help it in digestion. 

Addax form herds of five to 20 members, consisting of both males and females. as they lead by the oldest female, their most problems are the humans.

http://en.wikipedia.org/wiki/Addax