Resultaten van de huiszwaluwcensus in 1995
In 1995 a number of 1316 quarters of skm grids were investigated on the presence of 26748 nests of the House Martin (Delichon urbica). A calculation gives a minimum of 116.000 nests. It is again a decrease; in comparison with the census year 1994 a decline of 6% and 23% compared with the index year...
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| Veröffentlicht in: | Het Vogeljaar 1996-01 |
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| Hauptverfasser: | , |
| Format: | Magazinearticle |
| Sprache: | dut |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | In 1995 a number of 1316 quarters of skm grids were investigated on the presence of 26748 nests of the House Martin (Delichon urbica). A calculation gives a minimum of 116.000 nests. It is again a decrease; in comparison with the census year 1994 a decline of 6% and 23% compared with the index year 1990. |
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| ISSN: | 0042-7985 |