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