, Volume 41, Issue 5, pp 695-697

Sahara stopover in migratory flycatchers: fat and food affect the time program

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Summary

Migrating spotted flycatchers, resting and feeding in an oasis, have longer stopover periods when fat reserves on arrival are low. In the laboratory migratory activity could likewise be suppressed by a combination of two factors: low fat reserves and the possibility of feeding.

I thank W. Friedrich, G. Heine, R. Mitreiter, J. Resch, K. Roth, D. Schmidl and H. Schüle for assistance in the field; Said Abdel Razik for permission to work in the oasis in Egypt and for logistic help; K. Pfeiffer for providing the experimental birds; H. Wegner for running the experiment and E. Gwinner, J. Dittami and R. Stevenson for reading and commenting on the manuscript.