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🐦 How do birds know where to fly

Learn how migrating birds combine an inherited direction, the Sun and stars, Earth's magnetic field, landmarks, smells, weather, and memory to find routes and stopover places.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

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What you’ll learn

A direction is not a mapDistinguish inherited orientation from learned navigation and explain why flyways follow useful landscapes.Birds can begin with a rough inherited heading, then adjust routes using wind, habitat, and experience.
The sky supplies compassesExplain how birds use the Sun, stars, and Earth's magnetic field as overlapping orientation cues.Celestial and magnetic information provide different kinds of direction, especially under changing sky conditions.
The landscape becomes memoryConnect landmarks, smell, stopover habitat, and navigation errors to the reliability of migration routes.Repeated journeys turn places and environmental signals into a flexible route system that can still fail.

Questions this course answers

What is the difference between orientation and navigation?

Orientation is about maintaining a heading, while navigation includes locating the bird relative to its destination and correcting errors.

Why must a bird's Sun compass be calibrated?

A time-of-day system helps the bird interpret the Sun's changing position as a direction.

Which cue can help when clouds hide the stars?

Magnetic information does not require a clear view of the celestial sky.

Why are stopover wetlands important to migration?

Stopovers supply energy and rest, and familiar sites can also become part of a learned route.

What does a bird arriving off course show?

Weather, light, magnetic disruption, and inexperience can combine to overwhelm or distort otherwise useful cues.

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