reproductive performance of certain birds

例句：

1. 1. The study of birds' reproductive performance is crucial for understanding their evolution.
   研究鸟类的繁殖性能对于理解它们的进化至关重要。
2. 2. The female bird's reproductive performance can significantly impact the hatching success of her offspring.
   雌性鸟的繁殖性能可以显著影响其后代的孵化成功率。
3. 3. In some species, males may compete for access to females during the breeding season, which can affect their reproductive performance.
   在某些物种中，雄性可能会在繁殖季节争夺与雌性交配的机会，这会影响它们的繁殖性能。