The experimental enclosure was semicircular with a radius of 2 m and a height of 1 m. The floor of the experimental enclosure was green artificial turf approximately 2.5 cm high. The mesh of the enclosure was plastic netting with a mesh of 1.3 cm squares with a PVC frame. A food dish containing ∼0.5 L white millet and black oil sunflower seeds was 10 cm from the front edge of the enclosure in the center. The top of the back, semicircular edge of the enclosure had strands of artificial, leafy vegetation attached 10 cm below the roof of the enclosure. The vegetation covered 12–20 cm of the outer wall of the enclosure. This vegetation provided refuge for escape (similar to Morgan and Fernández-Juricic, 2007).