I did have my doubts myself believe you me, but this is from a genuine source and I didn't know if it was 'educational' and 'beneficial' to post. The paler shell looks like it has hatched, otherwise I wouldn't have posted and had there been any possibility of it being dodgy I would have told the source so.
I had asked for more information , becomes curiouser and curiouser,
From East Lancashire in UK.
"Deep up a moorland valley. The only trees are five twisted and knarled hawthorns which look like a grown out hedge, the eggs are on the floor beneath one of them". Sounds like predation to me by unknown, possibly raven, corvid or possibly a hawk. To have two completely different eggs from one remote location...
PS
From suggested previous,
Does that mean I cannot clean out my garden nestbox, even if it has failed egg left in it? Do I need a licence?
Can I clean up the fallen and hatched blackbird egg shell from my garden, or do I have to leave it; where I have purposely encouraged wildlife and made opportunities for safe breeding birds and animals? If I turn over the compost heap, or clean leaves off the pond and disturb a newt am I guilty of an offence?