Embryonic Miracles: the Disc

After chameleon eggs are laid, many breeders often experience anxiety regarding the viability of the clutch. This concern typically arises during the candling process, where the eggs are examined for signs of life. Initially, the eggs usually do not display any significant indicators of development, leading to the impression that they may be infertile.

However, it is important to recognize that the visibility of internal structures within the eggs is quite limited during the early stages of incubation. Notably, certain features, such as veins and blood vessels, begin to develop primarily in the later phases of incubation rather than at the outset.

Approximately one month into proper incubation, breeders can expect to see a discernible change within the eggs. A small, darkened disc known as the embryonal disc becomes visible. This structure consists of a coiled embryo that is entering the early stages of development. The presence of this embryonal disc serves as a clear indication that a new generation of chameleons is in the process of forming.

37th day of incubation of Chamaeleo calyptratus, photos courtesy Rian Mc