Unkown nesting …

Since the last 3 days we noticed something is digging a nesting hole in the yard This morning the hole looked to be about 30cm deep or maybe more. It is very close the the house and observation deck, but I have not seen any tracks or feathers close by, even though the ground around it is fairly loose Will be interesting to see what it is, even though they will soon come out on the other side of the dirtmound, if they/it does not start digging downwards 🤔???