Bergmann’s rule and Allen’s rule in two passerine birds in China

Table 2 Spearman’s rank correlation between morphological measurements in the Oriental Magpie (Pica serica) and the Oriental Tit (Parus minor)

Species	Traits	Parameter	Male			Female
Species	Traits	Parameter	Body mass	Wing length	Bill length	Body mass	Wing length	Bill length
Pica serica	Wing length	r	0.382			0.414
		p	< 0.001			< 0.001
		n	80			81
	Bill length	r	0.276	0.170		0.459	0.236
		p	0.016	0.136		< 0.001	0.043
		n	76	78		72	74
	Tarsus length	r	0.462	0.126	0.510	0.333	0.244	0.486
		p	< 0.001	0.264	< 0.001	0.003	0.029	< 0.001
		n	79	81	77	78	80	74
Parus minor	Wing length	r	0.291			0.368
		p	< 0.001			< 0.001
		n	259			130
	Bill length	r	‒ 0.009	‒ 0.136		0.033	0.097
		p	0.893	0.033		0.721	0.292
		n	241	243		122	121
	Tarsus length	r	0.223	0.170	0.108	0.092	0.182	0.197
		p	< 0.001	0.007	0.102	0.313	0.045	0.036
		n	245	247	229	122	121	114

ISSN: 2053-7166