Table 5.

Annual summary data for proportion of juveniles solving the task. The timing of breeding is the number of days between the mean lay date and the ‘half fall’ winter moth larvae date for those years; higher values are better timed [121]. Over-winter survival of fledglings is the average number of nestlings per nest that recruited back into the breeding population the following breeding season. Daily mean temperature data were downloaded from the Met Office (www.metoffice.gov.uk/climatechange/science/monitoring/ukcp09/, 50 km grid square: 400 000 E, 200 000 N).

season	PSP	timing of breeding relative to food (high values = better timed)	following winter temperature (mean daily temperature Sept–Nov, °C)	following over-winter survival of fledglings (recruitment)
2006–2007	0.37	32.8	12.9	0.66
2007–2008	0.51	26.5	10.7	0.29
2008–2009	0.54	28.3	10.0	0.22
2009–2010	0.36	32.7	11.7	0.58