Biology
Members of the clan are not necessarily related biologically (bloodlines are shown to mean little to most gargoyles during the course of the series). Nevertheless, the gargoyles in a clan will consider themselves members of a single extended family, often referring to others of their generation as "Rookery Brothers" or "Rookery Sisters". This reflects the fact that gargoyles are hatched from eggs, which are stored communally in a rookery. As such, parents are never certain which of the hatchlings is their biological offspring. Rather, hatchlings are "children of the entire clan".
The creator of the series, Greg Weisman, has stated that he considers gargoyles to be naturally attuned to the planet's rhythms. As such, female gargoyles will become fertile on the autumnal equinox every twentieth year, and will lay a single egg on the following spring equinox. All of the eggs will be stored together in the clan's rookery, and the communal hatching occurs ten years later.
Read more about this topic: Gargoyle Clan
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