This article examines how the poetry of Mary Oliver and Gary Snyder unsettles human exceptionalism and imagines ethical relations across species, bodies, and environments. Drawing on posthumanist thought, ecocriticism, and deep ecology, it argues that both poets relocate human beings within wider ecological networks rather than treating nature as a passive backdrop to human experience. Oliver’s attentive encounters with birds, insects, flowers, and other animals cultivate humility through observation, wonder, and the recognition of nonhuman lives as meaningful in themselves. Snyder’s poetry, shaped by Buddhist thought, bioregionalism, and ecological activism, more explicitly challenges anthropocentric culture by presenting humans as participants in a community of beings. The article compares their different poetic strategies: Oliver often begins with intimate acts of attention and contemplative transformation, while Snyder connects ecological awareness to place, community, and critiques of industrial civilization. The discussion also notes that neither poet simply erases human experience; rather, both revise the human subject as embodied, dependent, and ethically answerable to more-than-human worlds. Through close readings of selected poems, the article demonstrates how their poetry contributes to posthumanist debates about agency, relationality, and ecological belonging.