When I think of the word 'obstruction' I usually think in terms of visual obstruction. In nature visual obstruction is rarely accidental. I have no idea how long this fawn watched me before I became aware of its presence but I'm willing to bet I only saw it because it allowed me to see it. In this case the obstruction became an enhancement of the setting. It is also a good example of how easy it would be to miss the wonder of life around you if you are not alert to the subtle signs.