The relationship of three time interval variables with spring temperature (Table 1) and year effects.

Arrival-Juvenile = the interval between spring arrival and juvenile appearance (10% quantiles). Arrival-Breeding = the interval between spring arrival and breeding initiation as indicated by presence of female breeding condition (10% quantiles). Breeding-Juvenile = the interval between breeding initiation and juvenile appearance date. Parameter estimates for slopes are listed for significant effects (§ = P<0.10, * = P<0.05, ** = P<0.01, *** = P<0.001). N = years with >10 captures. Temp = days per 1°C increase.