(3) Most of individuals were diploid full sibs in the nest, but some individuals were unrelated with them;(4) All individuals in the nest were unrelated.

• 4、巢内所有雏鸟个体间均为非同胞关系，即多个雌性个体将受精卵产于同一巢内，而且雏鸟个体之间既不同母也不同父。