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Providing evidence to improve practice

Individual study: Leaving unmown refuge areas in grassland mown for hay reduces corncrake Crex crex and common quail Coturnix corturnix chick mortality in the Val de Saône, France

Published source details

Broyer J. (2003) Unmown refuge areas and their influence on the survival of grassland birds in the Saône valley (France). Biodiversity and Conservation, 12, 1219-1237


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Provide refuges during harvest or mowing Farmland Conservation

A replicated study in 1996-1997 in 62 hay fields in Bourgogne, France (Broyer 2003) found that contact between mowing machinery and unfledged quail Cortunix cortunix and corncrakes Crex crex was reduced by approximately 50% and 33% respectively, by leaving 10 m-wide, uncut strips in the centre of fields. In addition, unmowed strips had the highest concentrations of corncrakes, quails and passerines (7.7 birds/ha, 3.8 birds/ha and 10.8 birds/ha respectively in 1996). All refuge areas were mown within the first 10 days of August using the ‘outside-in’ method. During mowing, observers with binoculars recorded birds in the refuge areas.

 

Leave refuges in fields during harvest Bird Conservation

A replicated study in 1996-7 in 62 hay fields in Bourgogne, France (Broyer 2003), found that contact between mowing machinery and unfledged common quail Coturnix coturnix and corncrake Crex crex was reduced by approximately 50% and 33% respectively, by leaving 10 m wide, uncut strips in the centre of fields. In addition, unmowed strips held the highest concentrations of corncrakes, quails and passerines (7.7 birds/ha, 3.8 birds/ha and 10.8 birds/ha respectively in 1996).