Frequency of the last action in two consecutive unsuccessful copulation attempts (n = 17 sequences) and between the final unsuccessful copulation and subsequent copulation (n = 4 sequences).

The penultimate and ultimate attempts refer to sequences where birds do not successfully copulate; the final unsuccessful attempt and copulation columns refer to birds that eventually copulate successfully (n = 11 sequences).

倒数第二次尝试与末次尝试，均指代鸟类未成功完成交配的行为序列；而‘末次未成功尝试’与‘交配’两列，则对应最终成功完成交配的鸟类样本，共计11条序列。