Duck eggs are thicker primarily because of a thicker shell and a protective outer layer.
Reasons for Thicker Duck Eggshells:
- Shell Thickness: Duck eggs generally possess a thicker shell compared to chicken eggs. This inherent difference in shell structure contributes to their robustness.
- Protective Bloom: Ducks apply a waxy, waterproof layer called a "bloom" (or cuticle) to their eggs. This bloom acts as a natural barrier, protecting the egg from bacterial contamination and moisture loss, thereby extending its shelf life. This is especially important as ducks often lay their eggs near water.
- Calcium Content: The amount of calcium available to the duck during egg formation affects the shell thickness. Ducks typically have access to diets that allow for a good amount of calcium uptake and therefore, the shell production is enhanced.
In summary, the combination of a thicker shell structure and the presence of a protective bloom contributes to the overall thickness and resilience of duck eggs. This not only safeguards the developing embryo but also provides a longer shelf life for consumption.
