Fig. 1From: Brightness of melanin-based plumage coloration is a cue to oxidative stress in Himalayan Black Bulbuls (Hypsipetes leucocephalus nigerrimus)The Log (H/L ratio) of two sexes in different years. The circles indicate the average Log (H/L) ratios for 2011 and the triangles indicate those for 2010. The lines indicate the standard error. The solid symbols represent the females and the hollow ones represent the males. Two-way ANOVA, factor year includes 2010 and 2011. df = 1, *p < 0.05Back to article page