Birds 3 Flashcards
1
Q
Give examples of methods of orientation for migration.
A
- Magnetoreceptors in bill of homing pigeon
- Solar orientation
- Visual landmark
- Star pattern orientation.
2
Q
What stimuli are there for migration?
A
- Day length
- Temperature
- Atmospheric pressure
- Hormonal pathway.
3
Q
Define migration.
A
- 2-way movement between breeding and wintering areas
* Varies with latitude & altitude.
4
Q
What are the drawbacks of migration?
A
- Energy expenditure
- Predation
- Collision
- Hazardous journey & habitat changes.
