The savanna gets a fair amount of rain, at least 20 inches a year.
Antarctica
Australia
Asia
North America
They all migrate in different directions
They avoid each other as much as possible
They eat different foods
Their territories don't overlap
Winter and summer
Spring and summer
Winter and fall
Dry and wet
Midlatitudes
Different temperatures
Bajadas
Rain shadows
Ants protect them
A combination of the above defenses
They have thorns
They have toxic chemicals
All of the above
Developing fire-resistant cover
Growing quickly
Having deep roots
Temperate forest
Grassland
Desert
Tundra