Data summary.
A total of 58 nests were found and included in the initial stage of analyses between 2016 (n=5), 2018 (n=6), 2019 (n=21), and 2021 (n=26) from 31 May to 2 August. Out of these 58 nests, 24 succeeded (42%) and 34 nests failed (58%), either due to nest predation (71%) or abandonment (29%). We found 10 nests at “BEF”, 14 nests at “Low Jeff”, 19 nests at “Mid Jeff”, and 15 nests at “High Jeff”. Mean daily temperature (Fig. 1A) and precipitation (Fig. 1B) varied depending on the year and elevation. Across both study sites throughout the season, average minimum daily temperature was 11.4°C (se =0.21), and average temperature range was 11.5°C (se =0.25). When we examined the effects of initiation date, precipitation, and temperature from 2019 and 2021, 44 nests were included in the analysis. After backdating for initiation and hatch date, we removed 3 nests from the analysis because nests were found in the incubation stage but failed before hatch date. Average initiation date was June 17th (+/- 2 days), and average clutch size was 3.1 eggs in 2019 and 3.2 in 2021. The RF algorithm calculated 34 missing days of precipitation data (NRMSE = 0.078, HK = 0.39) for the “Low Jeff” Rain Gauge (1 July – 3 August 2021).