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Number of nests (and percentage within treatments) used in analysis of brood sex ratios in which one or more unhatched eggs and/or unsexed nestlings occurred. (Treatments were applied during the pairing and egg-laying stages.)
| all eggs hatched | at least one egg did not hatch | ||||
|---|---|---|---|---|---|
| treatment | all nestlings sexed | nestlings incompletely sexed | all nestlings sexed | nestlings incompletely sexed | totals |
| single cavity | 7 (35%) | 1 (5%) | 9 (45%) | 3 (15%) | 20 |
| surplus cavity | 6 (35%) | 1 (6%) | 4 (24%) | 6 (35%) | 17 |
