A normal egg, an extra large elongated egg, and a tiny, wild-bird egg I found i the grass  ten months ago an have kept safe since.  I do not plan to look inside that one ...tough maybe we could "candle " it with a strong back-light, as they do to determine sex or fertility.  Which reminds me of old Aunt Sammy, who told my semi-adopted brother William that she was his real mother, having (she claimed) been pregnant for twenty or thirty year with the offspring of an Oswegtchie River guide ... whose name I can't at the moment remember.