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).