Abstract
Migratory birds are known to be capable of using several environmental cues for orientation (see Emlen 1975 for a recent review). The sun is a potentially important source of compass information and many vertebrates possess sun compasses that are timecompensated via the internal clock. Nocturnal migrants cannot refer directly to the sun during migratory flight, but solar cues could be useful in determining take-off directions or in correcting for inflight displacements. A logical first step in analyzing the potential role of the sun in the orientation of nocturnal migrants is to determine if a functional sun compass exists in a spectrum of these species. Here we report the ability to perform sun compass orientation in the White-throated Sparrow (Zonotrichia albicollis).
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