Exposure to nature is known to improve human health, but little is known about how one of the most common forms of nature engagement, birdwatching, impacts psychological well-being - especially among campus populations at great risk for experiencing mental health challenges. This study engaged 112 campus participants in a stepped design experiment evaluating the degree to which five >30 minute weekly birdwatching (n = 62) and nature walk (n = 77) exposures impacted self-reported subjective well-being (WHO-5) and psychological distress (STOP-D) levels relative to a control group (n = 81). The directions of all relationships supported hypotheses that nature-based experiences, and birdwatching in particular, would increase well-being and reduce distress. These results build on preliminary evidence of a causal relationship between birdwatching and well-being and highlight the value of considering well-being impacts for specific types of activities in nature, underscoring the need for future research with larger and more diverse samples.