Buying beautiful birds because of their colours and voices
Question

                Is it permissible to buy beautiful birds so that one can enjoy their voices and colours?.
Praise be to Allah.
    Selling beautiful birds such as parrots, nightingales etc, so 
    as to enjoy their voices, is permissible, because looking at them and 
    listening to their voices is a permissible aim. There is no Islamic text 
    that forbids us to sell them or keep them, rather there are reports which 
    may be understood as meaning that it is permissible to keep them if one 
    gives them food and water and does whatever else they need. For example, 
    al-Bukhaari narrated that Anas said: I had a brother who was called Abu 
    ‘Umayr – he (the narrator) said: I think he was a weanling – and when he 
    came he would say: “O Abu ‘Umayr, what happened to the nughayr?” – a small 
    bird with which he used to play. Al-Haafiz said in his commentary Fath 
    al-Baari, when listing the things that we learn from this hadeeth: It 
    indicates that it is permissible for children to play with birds, and it is 
    permissible to spend money on permissible things that will entertain 
    children, and it is permissible to keep birds in cages and the like, and to 
    clip the wings of birds, because one or the other must have been done in the 
    case of Abu ‘Umayr’s bird, and whichever is the case, the other comes under 
    the same ruling. There is also the hadeeth of Abu Hurayrah (may Allaah be 
    pleased with him), according to which the Prophet  (peace and blessings 
    of Allaah be upon him) said: “A woman entered Hell because of a cat that she 
    detained, and she did not give it food or water, or let it eat from the 
    vermin of the earth.” If this is permissible in the case of cats, it is also 
    permissible in the case of birds etc. 

    Some scholars are of the view that it is makrooh to keep 
    birds as pets, and some of them said that it is not allowed, and they said 
    that is because man has no need to listen to their voices or enjoy looking 
    at them; rather this is a kind of extravagance, luxury and soft living, and 
    it is also a kind of foolishness, because it is enjoying listening to the 
    voice of an animal which is longing to be free, and which is sad because it 
    is not able to fly in the sky, as it says in al-Furoo’ wa Tas-heehihi 
    by al-Mardaawi (9/4) and al-Insaaf (4/275). End quote.