من لا يحضره الفقيه, volume 2, page 258

Hadith.2353 - Muhammad ibn Al-Fudayl narrated from Abu Al-Hasan (as): I asked him about a man who killed a pigeon from the pigeons of the Haram while in the Haram but not in the state of ihram. Imam (as) said: "He must pay its value, which is a dirham, and give it as charity or use it to buy food for the pigeons of the Haram. However, if he killed it while in the state of ihram within the Haram, he must offer a sheep as a sacrifice and also pay the value of the pigeon."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.2354 - Hafs ibn Al-Bakhtari narrated from Abu Abdullah (as) regarding someone who catches a bird in the Haram: "If the bird's wings are intact, let it go. But if its wings are not intact, care for it by feeding and giving it water until its wings are restored, then release it."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.