Strange eggs

Strange eggs

Observation - Strange eggs - UK and Ireland. Description: My wife was emptying out some old peat from a couple of large flower pots in our garden and she found 2 eggs, each one buried in a separate container. One broke but we managed to photograph the other. What could have laid such a large egg? It's about t

My wife was emptying out some old peat from a couple of large flower pots in our garden and she found 2 eggs, each one buried in a separate container. One broke but we managed to photograph the other. What could have laid such a large egg? It's about the size of a chicken egg and very slightly mottled.