Now consider sea turtle hatchlings on a Florida beach at night.

The moment they hatch, they crawl straight to the sea, with no parent there to show them.

Crawling to the sea is an instinct, and it gets the hatchlings away from the gulls and crabs on the sand.

Sea turtle hatchlings crawling down a Florida beach to the sea at night.

Now consider a young orca off the coast of Washington.

For years it hunts beside its pod and learns how the pod works together to catch seals.

Hunting with the pod is a learned behavior, and it gets the young orca food it could not catch alone.

A young orca swimming beside its pod off the coast of Washington.

Four behaviors: whether each one is an instinct or a learned behavior, and how it raises the chance of survival.