Animals use special clues from their environment to know when to start migrating. For example, some birds feel the days getting shorter and know it's time to fly south for winter. Like a clock in their bodies tells them when to go.
Examples
- A bird feels the days getting shorter and knows it's time to fly south.
- A salmon smells the river where it was born and starts swimming back.
- A butterfly wakes up when the temperature rises and begins its journey.
Ask a question
See also
Loading…
Discussion
Recent activity
Categories: Biology · migration,animal behavior,biological rhythms