Table 2. Performance of the 15 focal individuals on the penultimate and ultimate days when goslings passed the task, or of the 40^th and 41^st days of the individuals that did not pass (DNP) the task in the allotted time.

Family Group	Individual	Name Abbreviated	Sex	Correct Choices Penultimate day	Correct Choices Ultimate day	Days to Complete
A	1	KOR	M	9	6	DNP
A	2	KAM	F	13	13	41
A	3	ING	F	13	14	27
A	4	MIR	M	13	15	37
A	5	KRA	F	14	13	37
B	6	PRO	M	9	7	DNP
B	7	PER	M	12	10	DNP
B	8	GAI	F	7	9	DNP
B	9	MED	M	7	9	DNP
B	10	KRO	F	13	13	40
C	11	FRI	F	13	14	24
C	12	FRZ	M	13	13	40
C	13	HIL	F	13	13	36
C	14	BOL	F	14	14	33
C	15	EDE	M	14	13	20

Session marked in bold indicate performance above chance (Binomial tests P<0.05).