The ruling of Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) regarding the pigeons of the Haram is transmitted as follows: The expiation for killing a pigeon of the Haram will be a goat; the expiation for damaging its egg will be one dirham; for killing an ostrich, a camel must be sacrificed; for killing a cow, a cow must be sacrificed; and for killing a nilgai, a cow must be sacrificed.
Hadith Referenceسنن الدارقطني / كتاب الحج / 2548
Hadith Takhrij«أخرجه البيهقي فى((سننه الكبير)) برقم: 9821، 9974، والدارقطني فى ((سننه)) برقم: 2548، وعبد الرزاق فى ((مصنفه)) برقم: 8264»