Royal Ontario Museum (ROM)

As the Web Turns- Exploring the Complicated World of Black Widow Spiders

The Quimby Fest lecture introduced Dr. May Diana Andrade, a leading behavioral ecologist and Canada Research Chair, who examined the intricate biology of black widow spiders. The talk highlighted her distinguished academic career, recent appointment as dean at York University, and her commitment to science communication and diversity initiatives. Andrade framed spider behavior through the concept of sensory "umwelt," emphasizing that male black widows must locate sedentary females using limited visual cues and vibratory signals. She detailed the reproductive strategy—females produce one to two egg sacs monthly, each yielding 90‑400 spiderlings—and explained how juveniles employ ballooning, releasing silk to ride wind currents and disperse across unpredictable habitats. Memorable anecdotes illustrated cultural attitudes toward spiders, from the Red Spider Nebula’s aesthetic resemblance to a widow to the 1954 stadium sighting that birthed the term "spiders from Mars." Andrade also referenced her own research footage, collaborations with visual artists, and the broader media presence of spiders in films and television, underscoring the gap between scientific reality and popular myth. Understanding black widow ecology reshapes conservation priorities, informs pest management, and challenges entrenched arachnophobia. Andrade’s blend of rigorous research, public outreach, and advocacy for Black scientists demonstrates how nuanced science communication can shift perceptions and inspire inclusive participation in STEM.