highly significantp < 0.001
Results In total we measured 803 nests in the standardized nest box design from a total of 596 different females in 629 nest boxes; however, sample sizes for most of our analyses are subsets of these 803 (as detailed in table 1 ). Female identity showed a highly significant relationship with nest size (LMM 223 , χ 2 = 21.48, p < 0.001), as shown in table 2 .