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