There are no countries on the equator that are mostly desert. Because the region of the equator is noted for its heavy rainfall, deserts do not occur there.
All three countries are mostly desert
Namib Desert - located on the southwest coast of Africa, mostly in Namibia Kalahari Desert - south-central Africa mostly in Botswana.
There is no 'Siberian Desert.' Siberia is a cold region consisting mostly of taiga and tundra in northern Russia.
The country mostly covered in desert is Libya, where approximately 90% of its land area is part of the Sahara Desert. This vast desert landscape significantly influences the country's climate, culture, and economy. Other countries with significant desert coverage include Algeria and Chad, but Libya has the highest proportion of desert terrain.
The Sahara Desert is mostly highlands.
Salem, Massachusetts, is mostly a forested area and definitely not desert.
For a list of the 26 major deserts of the world and the countries where they are found click on this link.
Mostly desert(95%)
The southwestern states are mostly desert and semiarid land.
Antarctica is mostly a frozen desert, the largest desert in the world.
They live in Africa, mostly on land just outside or on the edge of a desert where they have sand to burrow in and scrubs and a few trees for safety.