Abstract: Oxidative stress is an important physiological mechanism mediating life-history trade-offs in birds, which is closely related to bird reproduction. Oxidative stress can affect avian mate choice through modulating the expression of sexual characteristics and sperm quality, mediate the trade-off between reproduction investment and self-maintenance, and predict reproduction success and chick growth. In turn, reproduction investment affects the level of oxidative stress. Most studies focus on behavioral exploration, and few are available for in-depth mechanism studies. It is important to fully understand the regulatory mechanisms of oxidative stress on bird reproductive behaviors and how these mechanisms co-evolve with changing environments. These all require in-depth thinking and exploration.

Key words: oxidative stress, reproduction fitness, mate choice, reproduction investment, reproduction success.