Nestlings were aged each survey and placed in three age classes: hatchlings (1–4 days), young nestlings (5–9 days) and old nestlings (10–14 days) respectively. This classification by age is arbitrary.
Nestlings were aged each survey and placed in threeage classes: hatchlings (1–4 days), young nestlings (5–9 days) andold nestlings (10–14 days) respectively. This classification by ageis arbitrary.