Naturalistic vegetation, water features, and complex substrates in zoo enclosures improve animal welfare by providing shelter, sensory diversity, and opportunities for natural behaviour.
Green infrastructure in zoo enclosure design serves multiple welfare functions simultaneously. Vegetation provides shelter from weather and from visual exposure to visitors — a primary stressor for many zoo animals. Live plants provide materials for natural behaviours including nest building, leaf manipulation, and foraging. Complex substrates allow animals to express species-specific behaviours including rooting, digging, and bathing. Water features used voluntarily for swimming or drinking engage motivation that static water provision does not. The challenge for zoo design is balancing welfare benefits of vegetation with safety and visibility requirements; the most innovative facilities achieve both through thoughtful landscape design.