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What factors affect the size of macaw eggs?

As already mentioned, certain factors affect the egg size of macaws. Let’s talk about them.

Species

Larger species lay bigger eggs than smaller species. Since their body structure is overall large, they have a large ovary, and their newborn babies are also large; they lay larger eggs.

Age

Age also contributes to the size of eggs. If a macaw breeds as soon as it hits puberty, it usually lays smaller eggs than usual. In fact, this also affects its body size. This is why most experienced breeders prefer keeping young macaws separate, so they do not mate until they are mature.

Breeding history

Moreover, the breeding history of macaws also impacts egg size. Usually, macaws lay smaller eggs during the first 1-2 breeding seasons. But as the female macaw ages and has already laid a few eggs, she starts laying bigger eggs.