That is so cool!
I recall hearing that during WWII, cattail pollen was explored as a protein
source, a way to fortify breads, etc. We have used it in bread, although it
wasn’t something that led me to spend time collecting it in quantity. So the
gallinules might be making a very good choice!
On the AutoLoop at MNWR today , I saw two different Common Gallinules climb
cattails to get to the pollen.
They were eating it themselves and also feeding it to their young.
The 30 sec picknit also shows some Gallinule parenting.