I stumbled across this hungry Blackbird baby that looked as if he/she had just fledged on Orkney in spring 2013- that is why you can see sheep wool and sheep droppings with the bird in the picture. :-) The baby’s parents were around, feeding him/her.
Seemingly helpless young birds who sit around all alone in broad daylight, begging loudly for food are often picked up by people who mean well - but in most cases these little guys are fed by their very reliable parents who are busy feeding the baby’s siblings, are absent to gather food or because they are hiding from you, human.
So if you suspect a fledgling (not a nestling as nestlings DO need help, they need to be placed back into their nest if healthy or taken to a rehabber asap) to be orphaned, hide better than a bird and watch stealthily and silently for about an hour to make sure that the parents sneak up to their baby and feed him/her yummy insects or - like in this case - earthworms. :-)