Research on telomere dynamics in wild birds suggests that telomere length may be determined during early life. However, the relationship between telomere length and lifespan is still being studied, with some findings indicating that external factors such as weather conditions and anthropogenic disturbances may also play a role. The topic is being explored in various species, including birds, bats, bees, and cattle, with some studies examining the effects of breeding, ovulation order, and diapause on telomere length.