Table 2. All choices per trial per bird per experiment.

The order in which the functional and relatively more functional choices (dark gray: water, heavy, light, rewarded color, connected), or non-functional and relatively less functional choices (light gray: sand, light, heavy, unrewarded color, unconnected) were chosen (columns) and whether the bird successfully obtained the food (marked with an X) for trials 1–20 (rows).

Experiment 1. Water vs. Sand					Experiment 2. Heavy vs. Light												Experiment 3. Heavy vs. Light Magic							Experiment 4. Colored U-tube					Experiment 5. Uncovered U-tube
GG					GG						BB						BB							BB					BB
	Insertion order					Insertion order						Insertion order						Insertion order							Insertion order					Insertion order
Trial	1	2	3	4	Trial	1	2	3	4	5	Trial	1	2	3	4	5	Trial	1	2	3	4	5	6	Trial	1	2	3	4	Trial	1	2	3	4
1					1						1				X		1							1	X				1		X
2		X			2			X			2				X		2		X					2					2			X
3			X		3			X			3		X				3		X					3				X	3		X
4	X				4					X	4				X		4							4			X		4			X
5	X				5			X			5			X			5	X						5	X				5		X
6	X				6						6		X				6							6				X	6	X
7	X				7						7			X			7							7				X	7				X
8			X		8						8					X	8							8		X			8				X
9					9		X				9				X		9							9	X				9			X
10					10						10				X		10							10				X	10	X
11					11						11	X					11		X					11	X				11	X
12	X				12	X					12			X			12							12			X		12			X
13					13	X					13					X	13							13			X		13	X
14					14						14					X	14							14		X			14				X
15		X			15	X					15				X		15			X				15					15
16					16	X					16			X			16	X						16				X	16			X
17		X			17		X				17	X					17	X						17		X			17
18		X			18						18	X					18			X				18	X				18			X
19			X		19	X					19			X			19							19		X			19	X
20				X	20			X			20					X	20			X				20		X			20