Spotted a hard-working mama opossum at my kid's school
I was interested why I saw her during the day. I googled it and sounds like they sometimes need to stay up during the day to care for and feed their babies. Sounds a lot like humans with newborns.
Apparently, babies of all species keep their mamas' awake!
I think that's more common among mammals. There are quite a few species where the parents copulate and dip out leaving the children to fend for themselves.