* Heat loss from the egg is prevented by a thin boundary layer of air adjacent to the [[Exotics_-_Composition_of_the_Egg_-_Anatomy_%26_Physiology#Shell|shell]].
* Heat loss from the egg is prevented by a thin boundary layer of air adjacent to the [[Exotics_-_Composition_of_the_Egg_-_Anatomy_%26_Physiology#Shell|shell]].
* If the egg is in a nest, the nest will also provide resistance to heat loss.
* If the egg is in a nest, the nest will also provide resistance to heat loss.