Firefly: First Generation, Fourth Mother

[Prompt: A character driven by wanderlust or the desire to explore
The absolute truth of miss Firefly's life is obscured by generations of tellings after the fact. She, even more than her mothers, has passed thoroughly into the realm of legend. That said, here is her story as best we know it.
Firefly was a simple skitter, one among the First Generation created by the three goddesses. This wave was experimental, and they did not have their fifth or sixth limbs. Except for a couple of bat-inspired, who gave up their paws for wings, there was no flight among the first wave, and no magic at all. Firefly was no exception, possessing no special advantages of fitness. But she did have a strong spirit of adventure, and that was enough to carry her from home and back.
Firefly had grown up with stories of the goddesses' adventures in another world -- the same stories you know, but told from the mothers themselves. Their love was strong for the other world and the creatures in it, evident in both the stories and the careful mimicry of those creatures' bodies in the goddesses' children. And that grandest love blanketed Firefly, so that she was struck with a fierce hunger to see such species for herself.
Thus, she set out to traverse the spinning world, where many days passed quickly through each season and deadness gave rise to life. The goddesses said it was a world without magic, but how could such a power not be the greatest sorcery?
During her travels, Firefly found many of the species she'd set out to. She carried with her a book of tightly bound life-matrix, into which she put samples of every species she could touch. She sketched the creatures' forms, taking note of every unique and special trait possessed by a certain species. In doing so, she had a collection of essence.
When her list was complete (or as complete as possible, considering the sad extinction of a few of the species), Firefly returned home. She gave her book to scholars and copiers, who were quick to preserve and proliferate her very valuable samples.
Eventually, these books would be distributed to every family across the islands, a bible of history and inheritance. With bodily samples, skitters and mothers could do more than mimic these species' forms; they could recreate them.
And so, our means of trait-stitching was born. A statue was built in Firefly's honor, in which skitters could place pieces of skitters (or original species) with zygotic sacs, in hopes the goddesses would grant the developing fawn that creature's traits.
Our whole way of life is thanks to Firefly's bravery and recordive diligence. That is why we call her the Fourth Mother.