Ritkább vízivadfajok előfordulása Magyarországon az 2000/2001-es vonulási idényben = The occurence ofrare waterbird species in Hungary during the 2000/2001 migration’s season

Hadarics, Tibor (2008) Ritkább vízivadfajok előfordulása Magyarországon az 2000/2001-es vonulási idényben = The occurence ofrare waterbird species in Hungary during the 2000/2001 migration’s season. MAGYAR VÍZIVAD KÖZLEMÉNYEK, 16. pp. 201-245. ISSN 1416-1389

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Abstract

The synchronous surveys conducted once in the middle of every month seem to be sufficient to describe the dynamics of migration of the species that frequently and in large numbers migrate through Hungary. It is clear, though, that we could get a more precise picture by the use of more frequent data collection since it is possible that the peak of a given species occurs in the period between two subsequent surveys (there often may be significant changes in the number of birds in a couple of days). The dynamics of migration of rare species cannot be precisely given with the monthly survey because the rarer the species, the less likely it can be seen during synchronous days. This report contains all the data of the rare or moderately rare species in Hungary covered by waterbird monitoring that can be found in the fauna data bases of the periodical Túzok by MME, thereby supplementing the already published synchronous results of these species. Naturally, these data cannot be compared with the synchronous data of frequent species, but they still give a somewhat better view of the migration of the given species. During the2000/2001 synchronous survey season the following rare species were observed. The number of observations is given in brackets...

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