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Counts of winter bird populations Vinterfagelrakningen

, : Counts of winter bird populations Vinterfagelrakningen. Var Fagelvarld Supplement, 21: 19-25

Accession: 038107649

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Related references

Svensson, Soren., 1995: Winter bird population censuses Vinterfagelrakningen. Var Fagelvarld Supplement, 22: 20-27

Lindstrom, A.; Svensson, S., 2006: Winter bird population censuses 30 year history Vinterfagelrakningen 30 ar. Var Fagelvarld, 652: 30-31

Dunn, E.H.; Sauer, J.R., 1997: Monitoring Canadian bird populations with winter counts. Canadian Wildlife Service Occasional Paper, 95: 49-55

Lepage, D.; Francis, C.M., 2002: Do feeder counts reliably indicate bird population changes? 21 years of winter bird counts in Ontario, Canada. Few monitoring programs in North America track bird populations at a continental scale during the winter, a critical stage of the life cycle for many species. To date, only Christmas Bird Counts (CBC) have been used to index bird abundance in wint...

Marshall, R.M. ., 1991: Resident bird counts, includes the breeding bird census and winter bird population study. Journal of Field Ornithology, 621: 1-99

Chamberlain, DE.; Wilson, JD.; Fuller, RJ., 1995: The effect of organic farming regimes on breeding and winter bird populations. Part 2. A comparison of breeding and winter bird populations on organic and conventional farmland. BTO Research Report. November; 154: 1-61

Stapanian, M., A.; Smith, C., C.; Finck, E., J., 1994: Population variabilities of bird guilds in Kansas during fall and winter: Weekly censuses versus Christmas bird counts. Fall and winter (September through March) weekly census data from 1978 through 1992 were examined for 18 species of birds in forests and cultivated fields near Manhattan, Kansas. The 18 species were grouped into five feeding guilds: frugivores; gr...

Walkinshaw, LH., 1984: Changes in winter bird life in Michigan: sixty years of Christmas bird counts in the Battle Creek, Michigan area. Jack-Pine Warbler, 623: 63-69

Jacobsen, EM.; Nohr, H., 1987: Winter bird counts.. Fugle, 75: 21

Nohr H.; Johansen L.; Braae L.; Klug Andersen B., 1983: Winter bird counts 1981 1982. Dansk Ornitologisk Forenings Tidsskrift 77(1-2): 57-59