In general, housing two different bird species in the same cage is not recommended. Birds of different species often have incompatible temperaments, size differences that create injury risks, different dietary requirements, and varying environmental needs that make cohabitation stressful and potentially dangerous.

Size mismatches are the most obvious concern. A larger bird like a cockatiel or conure can seriously injure or kill a smaller bird like a finch or budgie, even without intending to harm it. A playful nip from a large beak can break a small bird's bones.

Even similarly sized birds from different species may clash. Lovebirds, despite their name, are notoriously aggressive toward other species and can inflict severe beak injuries on cockatiels, budgies, and other small parrots. Territorial disputes over food, perches, and sleeping spots are common in mixed-species housing.

Disease transmission is another concern. Different species may carry pathogens that are harmless to one but deadly to another. Proventricular dilatation disease, psittacine beak and feather disease, and various bacterial infections can spread between incompatible cage mates.

There are limited exceptions. Some finch species can be housed together in a large aviary setting where each bird has ample space to establish territory. Budgies and cockatiels sometimes coexist peacefully in very large enclosures, though even this combination carries risk and requires careful monitoring.

If you want multiple bird species, house them in separate cages placed near each other so they can enjoy social interaction without physical contact. During supervised out-of-cage time, allow them to interact at a distance and intervene immediately if any aggression appears.

Always quarantine new birds in a separate room for 30 to 45 days before any introduction, even visual, to prevent disease transmission. Consult an avian veterinarian about species-specific compatibility before considering any shared housing arrangement.