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How does a walk-through aviary allow visitors to enter a bird habitat safely?

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A walk-through aviary allows visitors to enter a bird habitat safely by utilizing "air-lock" type doors. These doors serve as a secure transition point, preventing birds from escaping while allowing the public to enter the large, open space where the birds are given free run.1

By using this entry system, zoos can effectively contain the animals while providing an immersive experience that simulates a natural environment, often complete with vegetation and streams.1