data capture dates and energy stores

There are seven columns: 1. "energystores_capture": This is a numeric variable and it provides the individual energy stores at capture, estimated as detailed in eqn. 2 of the paper. 2. "Age.ad": This is a factor with two levels, i.e., "young" and "old". In autumn, "young" means 1st calendar year bird and "old" means that the individual was older than "young". In spring, "young" means 2nd calendar year bird and "old" means that the individual was older than "young". 3. "Sex": This is a factor with two levels. "1" says that the bird was a male and "2" that it was a female. 4. "subsp": This is a factor with two levels. "leu" says that the bird belonged to the leucorhoa subspecies of the northern wheatear and "oen" says that the bird belonged to the oenanthe subspecies of the northern wheatear. 5. “season”: This variable indicates whether the bird was caught in spring or autumn. 6. “year”: This variable indicates the year in which the bird was caught. 7. “jd”: This is the day of year of capture with 1 Jan is 1.