What're these eggs from? (North wales)

In North Wales, the discovery of these eggs, both empty and fully dry, raises intriguing questions about their origin and ecological significance. Understanding the species they belong to can provide insights into local biodiversity and environmental health. The context of their location further enriches this inquiry, as it may indicate broader ecological patterns or changes within the habitat. Engaging in this exploration not only fosters curiosity but also highlights the importance of observing and preserving our natural surroundings.