How old can an ostrich live in the wild?

In the wild, an ostrich can live up to 40-45 years. Although, their average lifespan is around 20-30 years. Ostrich lifespan can be affected by several factors, including predators, availability of food and water, and diseases.

Do ostriches charge to protect their nests?
Are adult Mallards especially while tending their nest capable of killing a juvenile raccoon?