Although mature oaks shed their leaves in winter, the youngsters hold on to theirs.
Here's a way to recognise oaks without leaves: The bud at the end of each shoot doesn't have just one or two buds, it has several.
Photo: Jean Murray
The oak tree may grow straight but there is a good chance that one of the buds pointing sideways will carry the shoot off at an angle.This is what makes oak branches so sinuous.