Skip to main content
. 2022 Feb 18;25(4):917–933. doi: 10.1007/s10071-022-01602-y

Fig. 1.

Fig. 1

Experimental apparatus and stimuli. a Three-dimensional aerial view of the apparatus. The tank was subdivided in a central hourglass-shaped testing compartment and two lateral compartments that housed natural plants and a mirror. Examples of stimuli used in b numerical discrimination and c discrimination of areas