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Figure 3


Fig. 3. Comparison of testis length of pine siskins, Cassin's finches and gray-crowned rosy finches across two times in the breeding season when day length varies between 14.0 and 14.5 h light (May: 8-26 May; July: 19 July-4 Aug) at Tioga Pass, California. Bars indicate mean ± s.e.m. For P values, see text. Asterisks denote significant differences between times. Numbers within bars indicate sample size.