I was sitting down watching a white-breasted nuthatch bouncing around the limbs of an oak tree. There were heaps of acorns scattered across the ground. I decided to open some of them up and have a look inside. Acorns are a nutritious food source, and I was curious how many had a little grub inside. Of the seven that I opened, only one was free from a grub. All of the others were in various states of being eaten and one of them was completely devoured. I wondered how many of the acorns become inhabited by these insect larvae. I see squirrels and jays carrying off acorns to cache for the winter, and I am sure they would be disappointed to discover later on that most of their acorns had spoiled. Are they able to tell which ones are free from larvae inside? It would be interesting to investigate their stash and see.