Table 2. Average density (km^-2) of stone curlew nests on areas (km²) of suitable arable land within each band of distance (m) to the nearest Trunk road; together with the upper limit of the maximum distance band for which nest density is statistically lower (Chi-square test P value <0.05) than average nest density in the combined higher distance bands (P value for each test given in brackets).

		Distance band to nearest Trunk road (km)
Period	Total nests (N)	<500	500-1000	1000-1500	1500-2000	2000-3000	Max distance (m) with lower nest density
All Years	443	0.061 (<0.001)	0.159 (<0.001)	0.274 (0.021)	0.346 (0.582)	0.370	1500
1988-92	112	0.082 (0.002)	0.108 (0.002)	0.211 (0.063)	0.336 (0.972)	0.338	1000
1993-96	86	0.073 (0.004)	0.164 (0.109)	0.208 (0.200)	0.270 (0.556)	0.320	500
1997-00	88	0.044 (<0.001)	0.134 (0.020)	0.291 (0.892)	0.315 (0.802)	0.294	1000
2002-06	167	0.047 (<0.001)	0.227 (0.004)	0.377 (0.209)	0.444 (0.525)	0.504	1000
2002	22	0.000 (0.030)	0.300 (0.825)	0.333 (0.524)	0.000 (0.012)	0.380	500
2003	24	0.058 (0.085)	0.060 (0.052)	0.277 (0.560)	0.300 (0.541)	0.414	0
2004	29	0.000 (0.013)	0.060 (0.021)	0.388 (0.695)	0.540 (0.549)	0.415	1000
2005	38	0.117 (0.046)	0.120 (0.024)	0.499 (0.809)	0.540 (0.954)	0.533	1000
2006	54	0.058 (0.002)	0.598 (0.728)	0.388 (0.079)	0.839 (0.771)	0.760	500
Area (km2) (%)		17.1 (18%)	16.7 (17%0	18.0 (18%)	16.7 (17%)	28.9 (30%))