The drive to reproduce is overpowering.
Animals use displays, gifts and battle to win mates.
Animals develop sophisticated ways to communicate.
Some species live in ordered communities.
Animals battle for food, territory and mates.
Certain species become interdependent.
Birds and animals build ingenious dwellings from available resources.
Migrating animals navigate the globe.
Both predators and prey try to survive.
Availability of food helps determine behavior and survival strategies for animals.
Young animals try to avoid danger and learn survival skills.
Evolution provides diversity for animals to give birth and care for their young.