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