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RADAR OBSERVATIONS OF BIRD MIGRATION IN CYPRUS
Author(s) -
Adams D. W. H.
Publication year - 1962
Publication title -
ibis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.933
H-Index - 80
eISSN - 1474-919X
pISSN - 0019-1019
DOI - 10.1111/j.1474-919x.1962.tb08640.x
Subject(s) - moonlight , bird migration , sunset , geography , radar , spring (device) , physical geography , geology , ecology , biology , paleontology , telecommunications , mechanical engineering , physics , astronomy , computer science , engineering
SUMMARY Observations by radar were made of bird migration in Cyprus in October and November 1958 and March to May 1959. Migration was found to occur almost daily, usually beginning three‐quarters of an hour after sunset. The standard direction of migration in October was S. to S.S.E., but in November there were movements both S. to S.S.E. and S.S.W. to S.W. Most spring migrants flew tracks between N.N.E. and N.E., but about 10% flew N.W., including the largest single passage recorded. Some bird‐tracks were seen avoiding high ground and coasting at high altitudes by day, and once by night in bright moonlight. The significance of the results is discussed.