Apologies for being a tad off topic but no sign of any critters having munched these leaves:
Ahhh, different continent, different leaves and probably different critters ;-)
Remind me to check for munched leaves in my filter box before the trip we are making over Easter...
As you requested - this your reminder, although still some time before Easter for the air box to become full of leaves, again.
I take it you removed the leaves etc. before closing the air-box ;-)