Ata narrates from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that for hunting a pigeon within the Haram a goat is the ransom, for two eggs one dirham, for an ostrich a camel, and for a wild ass and a (wild) cow, a cow is to be given as ransom.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9866