I want to know the answer to the following question:
How do birds act in the period before migration?
All the background I'm provided with is that "In the period before migration, many birds display higher activity or Zugunruhe (German: migratory restlessness), first described by Johann Friedrich Naumann in 1795, as well as physiological changes such as increased fat deposition.". Is that enough to answer the question?
Answer: yes