Table 1.

Coefficients and p-values of Pearson’s correlation among the occurrence of red-backed shrike and selected bird species, in farmlands of Western Poland during the breeding season of 2010. Significant values are in bold

	Lanius collurio		Cuculus canorus		Milaria calandra		Buteo buteo		Garrulus glandarius		Corvus cornix		Sylvia communis
	r	P	r	P	r	P	r	P	r	P	r	P	r	P
L. collurio	1	–	0.29	0.01	0.18	0.05	−0.11	0.04	−0.29	0.01	−0.34	0.00	0.42	0.00
C. canorus	0.29	0.01	1	–	0.03	0.83	0.03	0.83	0.01	0.92	−0.01	0.91	0.51	0.00
M. calandra	0.18	0.05	0.03	0.81	1	–	0.14	0.23	−0.17	0.16	0.14	0.25	0.06	0.63
B. buteo	−0.11	0.04	0.03	0.83	0.14	0.23	1	–	0.03	0.83	0.21	0.07	−0.06	0.60
G. glandarius	−0.29	0.01	0.01	0.92	−0.17	0.16	0.03	0.83	1	–	−0.08	0.50	−0.07	0.54
C. cornix	−0.34	0.00	−0.01	0.91	0.14	0.25	0.21	0.07	−0.08	0.50	1	–	−0.17	0.17
S. communis	0.42	0.00	0.51	0.00	0.06	0.63	−0.06	0.60	−0.07	0.54	−0.17	0.17	1	–