General:
* Mig. (common abbreviation in academic contexts)
* M. (brief, but may be ambiguous)
Specific:
* MIGR. (more formal and unambiguous)
* IM (for "international migration")
* DM (for "domestic migration")
* EM (for "economic migration")
Other:
* Use the first letter of the specific migration type, such as A for "animal migration" or B for "bird migration" if the context is clear.
It's important to consider your audience and the context when choosing an abbreviation. If you're unsure, it's always best to spell out the word "migration."