The ubiquity of multiple births is what gets me. There are three lesser-known duck nieces, April, May and June. Mickey had some nephews (usually two twins but sometimes a set of triplets, and with inconsistent names) that appeared about 5 years earlier, and Pete has twin nephews that appeared much later on.
Then again, given that these creatures are animals that tend to give birth to broods and litters, I guess multiple births should be expected as the norm, not the exception.
