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Table 6 One-sample t values (df = 10) comparing the difference in proportions for tree species in a 25 m radius of a nestbox with the proportion of leaf or bark of that species in the nest (Fig. 6)

From: Geographical location affects size and materials used in the construction of European Pied Flycatcher (Ficedula hypoleuca) nests

Comparison t (p value)
Oak leaves − 0.13 (0.901)
Oak bark 5.49 (< 0.001)
Birch leaves − 6.72 (< 0.001)
Birch bark − 3.20 (0.009)
Beech leaves 2.67 (0.024)
  1. No beech bark was identified in the nests