This paper analyzes the communicative practices of a Colombian trans-woman scientist, biologist Brigitte Baptiste, when she speaks publicly about environmental issues on different media platforms. In the analysis, I explore the implications of Baptiste’s public presence for the imaginaries of readers and journalists regarding science, scientists and trans-people in Colombia. Leaning on certain feminist critiques of science, I analyze communicative practices as matters of care. Throughout the analysis, I find that care in Baptiste’s public presence is performed through the ways in which she connects biodiversity and sexual diversity, thinking with trans-women’s experiences to transgress the borders of science and connect it to activism and public service. I conclude that Baptiste’s public presence in Colombia is an exceptional example of gender diversity acceptance in the present, though it does represent a speculative commitment towards embracing diversity in general in the future.