brown
[ In passing, ref prev' posts:
I will listen more carefully next time my ravens vocalise, but perhaps mine have a speech impediment
Re oak galls: I once did a school biology project on the oak. Unfortunately, not being sure how to euthanize oak gall maggots, I simply cellotaped a couple of living ones to the relevant page. Unfortunately they were still wriggling at teacher's marking time: I seem to recall Dr Matthews wasn't overly impressed by my presentation ! ]