It is narrated from Abu Musa Ash'ari (may Allah be pleased with him) that he said regarding the egg of an ostrich: "Whoever in the state of Ihram picks it up, then there is a compensation of fasting for one day or feeding one needy person upon him."
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 892
Hadith Takhrijاسناده ضعيف، لضعف سعيد بن بشیر اخرجه البيهقي : 20/5 - وفى المعرفة السنن والآثار له (3222) ۔ وعبد الرزاق (8293)۔