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