Table 1.

Descriptive statistics for incubation patterns of American robins (Turdus migratorius) breeding in central Illinois, USA (n = 51). Data were collected using metallic temperature probes (iButtons). Each iButton was preprogrammed to collect data every 2 min, removed from the nest every 2 days, and exchanged with a newly programmed iButton

Parameter	Mean (SE)
On‐bout duration (min)	33.7 (0.95)
Off‐bout duration (min)	20.6 (0.40)
On‐bout temperature (°C)	39.3 (0.24)
Off‐bout temperature (°C)	22.9 (1.03)
Overall mean temperature (°C)	28.3 (0.72)