I am glad that readers pointed out that some animals are in clear distress, that is, visibly injured or obviously orphaned and there is a need to intervene. I will tell you now that I purposely left that point, since so many more juveniles that we see are in no distress, than those that are. Of course, as soon as they are picked up by a human, they ARE in distress and have to be transferred to rehab or euthanized.
This is a mistake that often cannot be fixed. When juveniles are removed from their mother, generally the mother will move on in a short time, and so will not be there to care for them, even if returned to the site. Unless we knew that the mother is there, and will accept her offspring, we risk leaving them to suffer slow starvation.