I have placed a number of trees in a scene and am satisfied with their positions.

Now I would like to replace those trees with a different species of tree in the exact same locations.

Is there a simple and quick way to do this ?

Edit the Skatter setup (either in the Render List if it’s Render Only, or right-click on the group in the viewport), then in the “Scattered Objects” list, delete the current tree, and pick the new species.

Thank you Thomas.

The only reason placement would change is if you have enabled collisions, is it the case?