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. 2022 Jul 1;12(13):1711. doi: 10.3390/ani12131711

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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A blueprint of the indoor orangutan exhibit study area. The location of each of the five (5) cameras is indicated above in red. Beige (middle) indicates the dirt ground, light grey (center) indicates the cement ground, dark grey (bottom) indicates to the raised walkway and platform, and blue (upper right) indicates the water of the moat. Additional grey shapes (throughout) signifies the location of enrichment objects, with green dots referring to the base of the jungle gym bars. Note for scale: Each section of the dark grey walkway is 6 ft wide.