Bird on ground

I was sitting at the Diana park, a small park so called because of a statue of Diana about to throw a spear, when I noticed a couple turning to look behind them when they were passing me.  I looked back and there was a small fluffy  crow on the ground, clearly a baby. It walked forward a bit  and then I heard a crow calling. It called many times but the chick only called once, feebly. Not easy for the mother to find it. I hope that no-one will pick it up so the mother can continue looking for it.