Figure 3. Abundance of black-necked gartersnakes (Thamnophis cyrtopsis) observed during surveys in Sabino Canyon Recreation Area, Tucson, Arizona, 2019 & 2021.

Predicted likelihood of abundance, proxied as the total number of individuals observed per visual encounter survey. Abundance was driven by season (colors) and survey minimum ambient temperature (±0.1 °C). Data from 2020 was omitted due to restrictions from COVID-19 and the Bighorn Wildfire.