Table 1.

Orientation performance scores of all birds tested in the magnetic orientation task and in the visually guided orientation task

magnetic orientation			visual orientation
bird	shifted field	shifted field + HF	bird	shifted field	shifted field + HF
b1	0.7	0.4	b11	0.9	1
b2	0.9	0.5	b12	0.6	0.7
b3	0.7	0.4	b13	1	1
b4	0.7	0.3	b14	1	0.7
b5	0.6	0.4	b15	0.9	1
b6	0.8	0.8	b16	0.9	0.8
b7	0.8	0.6	b17	1	0.9
mean	0.74	0.49	mean	0.9	0.87
SD	0.098	0.17	SD	0.14	0.14

Scores were calculated from the number of correct and incorrect choices of each bird. A score of 1 shows that all choices were in the correct axis (for magnetic orientation) or in the correct direction (for visual orientation), 0 determined no correct choice.