Documentaries have always had a knack for turning the overlooked into the unforgettable. For every sweeping, BBC-style epic like Planet Earth, there exists a quieter, stranger archive of films that obsess over the margins: the competitive subculture in Tickled, the niche aesthetics of typography in Helvetica, or even the oddly hypnotic deep dive into online eccentricities in The Institute. 

It is fitting, then, that the SXSW EDU 2026 spotlighted one such film for its screenings: Second Nature: Gender and Sexuality in the Animal World, a project that interrogates something we casually label “natural,” only to reveal how culturally loaded and controversial that label truly is.

And yet, like many documentaries that thrive on curiosity rather than commercial spectacle, finding Second Nature is not as simple as opening your usual streaming app. 

As of now, Second Nature: Gender and Sexuality in the Animal World is not available on Netflix, despite the platform’s expansive documentary slate. Instead, its life unfolds through curated spaces: film festivals and specialty screenings. Digitally, the closest you will get is via MUBI, where the film is listed, hinting at a more curated streaming trajectory rather than mass accessibility. And the subject matter justifies that careful placement.

The documentary made notable appearances at events like Frameline48 in 2024 and continues to surface in academic and cultural venues, including screenings at institutions such as the Billy Wilder Theatre at the UCLA Hammer Museum. By 2026, the documentary expanded its footprint internationally, appearing at the Mardi Gras Film Festival and the academically inclined SXSW EDU, each stop reinforcing its role as a conversation starter moving across borders, classrooms, and communities.

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But that only scratches the surface of what Second Nature sets out to do.

Did you know clownfish can change s** from male to female, meaning Nemo’s father would biologically become his mother? Or that albatrosses, penguins, and swans often form same-sex parenting pairs? Even bonobos, our close evolutionary cousins live in matriarchal societies where same-sex intimacy is routine. Second Nature follows such animals with pioneering evolutionary biologist Joan Roughgarden. 

Across ecosystems and species, she and other researchers document over 1,500 animals that engage in same-s** behavior, fluid s** transitions, and non-patriarchal social structures. Guiding this journey is Elliot Page, whose involvement carries its own layered significance. Before publicly coming out as transgender, Page was known as Ellen Page, a transition that mirrors, in a deeply human way, the very fluidity the documentary explores in the animal kingdom. 

As both narrator and executive producer, Page anchors the film with lived authenticity, reinforcing its thesis. Second Nature ultimately reframes biology not as rigid doctrine but as an ever-evolving spectrum.

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If you do manage to catch it at a festival, on MUBI, or in a rare screening, consider it a recalibration. And when you are done, share your take in the comments.