What percentage of their typical metabolic needs do female wood ducks utilize when laying eggs?

When female wood ducks are laying eggs, they experience an increase in metabolic demands due to the physiological processes associated with egg production. The correct answer reflects that these females utilize about 210% of their typical metabolic needs during this crucial reproductive period. This significant increase is essential for supporting the development of eggs, ensuring they have the necessary nutrients and energy to produce viable offspring.

The increase in metabolic rate during egg-laying is a physiological adaptation that enables female wood ducks to invest heavily in reproduction. Such adaptations are common in bird species, where the energy costs associated with laying and developing eggs can substantially exceed normal metabolic requirements.

Understanding this percentage helps in the broader context of avian ecology and conservation, particularly in assessing the health and survival strategies of species like the wood duck. High metabolic rates during critical life stages emphasize the importance of habitat availability, food resources, and environmental conditions that support successful reproduction.