After a few sub-zero-Celsius nights and not much higher daytime temperatures, the pond at Cardiff Bay Wetlands Reserve had mostly frozen over, and the Mallards and a Coot were sticking to a small open area on the far side. But, when a couple arrived with food for the birds, Ms Mallard was tempted out of her little patch of unfrozen water to reach the treats. I felt a bit mean but I couldn’t help laughing at her slip-sliding her way across the ice.