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Fig. 4 | Avian Research

Fig. 4

From: The role of climate factors in geographic variation in body mass and wing length in a passerine bird

Fig. 4

Correlations between wing length of P. montanus and climate factors. a Air pressure (male: df = 37, t = −2.643, p = 0.012; female: df = 34, t = −2.087, p = 0.008), b relative humidity (male: df = 37, t = −5.407, p < 0.001; female: df = 34, t = −2.027, p = 0.046), c annual precipitation (males: df = 37, t = −2.884, p = 0.007; female: df = 34, t = −0.559, p = 0.580), and d annual sunshine hours (males: df = 37, t = 4.605, p < 0.001; female: df = 34, t = 0.325, p = 0.746), at collection sites. Data on males are shown as open circles and dashed lines and those on females as black dots and solid lines

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