I want to know the answer to the following question:
In Australia, what percentage of passerine birds were partially migratory
All the background I'm provided with is that "Species may also travel shorter distances over part of their range, with individuals from higher latitudes travelling into the existing range of conspecifics; others undertake partial migrations, where only a fraction of the population, usually females and subdominant males, migrates.". Is that enough to answer the question?