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ORIENTATION WITH RESPECT TO THE SUN IN MIDWINTER

The Living Bird Fourtheenth Annual, Cornell Laboratory of Ornithology, 1975

Dabchick, Tachybaptus ruficollis. Arrows show direction of the sun's rays at midpoints of the indicated time intervals. Shaded columns indicate overcast sky; orientation random. Clear columns indicate cloudless sky; birds tend to face away from sun. Figure is based on two sets of ten-hour observations involving 855 instantaneous determinations of orientation.