Short answer: Yes, budgies and cockatiels can live together; the RSPCA lists both among the smaller colony species that can share a cage or aviary. But it only works with a cage big enough for both to fly and escape each other, separate food and water stations, a 30–45 day quarantine, and a slow introduction. For most homes with standard indoor cages, two cages side by side is the safer default.
Budgies and cockatiels are both popular, sociable pet birds, and it’s a common question whether they can simply share a cage. The honest answer is that it’s possible in some cases, but it comes with real risks that are worth understanding before trying it.
What Makes Cohabitation Risky?
The core issue is the size difference. VCA gives an average cockatiel weight of 80–95 g and length of about 12.5 inches, while Pet Poison Helpline uses 35 g as the weight of an average budgie, so a cockatiel is more than twice as heavy with a stronger beak. A dispute over a perch or food dish can injure the smaller bird even without real aggression. The reverse can also happen: VCA describes budgies as active, inquisitive birds and cockatiels as generally gentle, so a mild cockatiel can end up stressed and pushed off food.
Other risks the veterinary guidance points to:
- Competition at resources: the RSPCA notes that most aggression happens around food and water containers and the high perches birds choose for roosting.
- Feather barbering: the Merck Veterinary Manual lists cagemates chewing each other’s feathers as a cause of feather damage.
- Shared infections: Merck notes budgies and cockatiels can carry psittacosis without obvious illness. The 2017 veterinary and public-health compendium on Chlamydia psittaci found human cases most often follow exposure to pet cockatiels, parakeets and conures.
- Breeding behavior: the RSPCA warns that dark, enclosed spaces can trigger nesting and make birds aggressive toward others.
What Do Avian Care Experts Recommend?
Guidance differs in emphasis. The RSPCA says colony species such as budgies, cockatiels and lovebirds can be kept together if they are compatible, every bird can fly well, and there is enough room for them to get out of each other’s space. Merck’s guide to providing a home for a bird is more cautious: not all birds get along, a shared cage must be even bigger, and you should ask a bird vet whether particular birds can live together. VCA’s guide to introducing a new bird adds that pet birds not raised with other birds often bond to their owners and may never fully accept a newcomer.
Putting that together: separate cages placed near each other give most of the social benefit with far less risk. A shared cage is reasonable only if you can meet every item in the checklist below.
How Big Does a Shared Cage Need to Be?
| Factor | Budgie | Cockatiel |
|---|---|---|
| Average weight | About 35 g (Pet Poison Helpline) | 80–95 g (VCA) |
| Minimum cage for one bird | 20 × 12 × 18 in (Long Island Bird & Exotics Veterinary Clinic) | 2 × 2 × 3 ft / 60 × 60 × 90 cm (VCA) |
| Average lifespan | 5–10 years (Merck) | Up to 20 years (Merck) |
| Bar spacing | No more than ½ inch (Chicago Exotics Animal Hospital) | Must still suit the budgie if shared |
For a group in one cage, the RSPCA says each dimension should be at least twice the largest bird’s wingspan, with extra space added for every bird beyond two. In practice that means starting from the cockatiel’s minimum, going larger, and choosing bar spacing safe for the budgie.
What’s a Safer Way to Let Them Socialize?
- Quarantine first. VCA recommends a separate room for 30–45 days and an avian vet check for any new bird before the two meet.
- Cages in the same room. Start with the cages some distance apart; the RSPCA’s method for introducing caged birds begins about half a metre apart and moves the cages closer over several sessions.
- Supervised meetings on neutral ground. Short sessions (the RSPCA suggests five to ten minutes at first) away from both cages, with more than one food bowl.
- Watch body language. Copying each other, sitting close or eating together are good signs; lunging with an open beak, chasing or one bird constantly avoiding the other mean you should separate them and reassess.
- Keep a backup cage. If you do move them in together, have a second cage ready.
What Should You Watch for If You Do House Them Together?
Watch closely for the first weeks, especially at feeding time and when the birds settle to roost. Warning signs include one bird guarding food or water, chasing the other off preferred perches, damaged or chewed feathers, or any physical fight beyond brief posturing. A bird that is being bullied may also eat less, so weigh both birds regularly and watch for the signs of illness in pet birds. A budgie that suddenly stops chirping after a new cage mate arrives needs a closer look.
Provide at least two feeding and water stations, enough perches at the top of the cage for both birds, and a pellet size suited to each; see our guide to what pet birds eat and our cage setup guide.
What’s the Bottom Line?
Budgies and cockatiels can share a cage, but it is a project, not a default. Separate cages placed where the birds can see and hear each other give you most of the social benefit with much less risk. If you want to try cohabitation, quarantine first, go slowly with close supervision, give them far more space than either needs alone, and keep a second cage ready in case it doesn’t work out.
This article is for informational purposes only and does not replace guidance from your veterinarian.
Sources
- RSPCA — Living With Other Birds
- RSPCA — Housing and Environments for Pet Birds
- VCA Animal Hospitals — Introducing a New Pet Bird, August 2023
- VCA Animal Hospitals — Cockatiels - General Information, April 2023
- VCA Animal Hospitals — Budgies - General, October 2022
- Merck Veterinary Manual — Providing a Home for a Bird, March 2026
- Merck Veterinary Manual — Skin and Feather Disorders of Pet Birds, May 2026
- Merck Veterinary Manual — Choosing a Pet Bird, April 2025
- Balsamo G, et al. — Compendium of Measures to Control Chlamydia psittaci Infection Among Humans and Pet Birds, 2017, Journal of Avian Medicine and Surgery, September 2017
- Pet Poison Helpline — Top 5 Toxins for Companion Birds
- Long Island Bird & Exotics Veterinary Clinic — Budgie Care Guide
- Chicago Exotics Animal Hospital — Budgie Care
