Making some reseach in wild birds parasites I found these eggs in feces samples.
Birds hosts:
A - Asio otus [ long-eared owl ]
B - Athene noctua [ little owl ]
C - Aquila pennata [ booted eagle ]
D - Milvus migrans [ black kite ]
E - Buteo buteo [ common buzzard ]
F - Athene noctua [little owl ]
I thinks they're all the same kind of egg, they're very similar in morphology and size.
Thank you, in advance, for your kind help!