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