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SESK: Stuff Everyone Should Know · sesk.info/bird-cage-wingspan-rule

How big should a bird's cage be, at the very least?

One and a half times its wingspan in all directions.

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  1. Just as wide as its body
  2. 1.5 times its wingspan in every direction ✔
  3. Exactly as tall as its tail

Why: Merck says the cage should be at least one and a half times the bird's wingspan in all directions so it can stretch. Small cages stress birds.

Huh, didn't know that: Merck says a cage for more than one bird must be even bigger.

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Why did the bird get a bigger cage? It needed more tweet-ing room.
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References

Answer: 1.5 times its wingspan in every direction. Merck says the cage should be at least one and a half times the bird's wingspan in all directions so it can stretch. Small cages stress birds.

  1. Merck Vet Manual: Providing a Home for a Bird www.merckvetmanual.com/bird-owners/choosing-and-taking-care-of-a-pet-bird/providing-a-home-for-a-bird
    The cage should be at least one and a half times the size of the bird's wingspan in all directions
    Checked 2026-10-11.

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