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