Funny thing but since I have been photographing trees I see interesting trees and groups of trees all over the place.
A key to making a successful image is to make the subject trees stand out from the background. That way the image shows them as I see them. In this case shooting at night and illuminating the birches separated them from their surrounding much more than they appear during the day.
I have also noticed that different types of trees seem comfortable in different environments. Birches, for example, are often to be seen in small groups. Oaks or Willows don't mind standing in a paddock all alone as a shade tree. Pretty much all NZ native trees look lost when out by themselves. Even a small stand of native bush seems to be longing to be part of a bigger forest.
The exotics have obviously got used to being bossed around by humans.