LPBOLong Point Bird Observatory (Canada)
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Chi-square analysis was used to determine whether the ratio of males to females in each morph differed from 1:1 after the proposed sexing criteria had been applied to the LPBO dataset.
When we reapplied the revised sexing criteria to the LPBO data and conducted a one-sample sign test on the data, 1.
Progression of the spring passage for the four sex-morph classes of White-throated Sparrow at LPBO is shown in Figure 1.