TY - JOUR T1 - Segregation in the African wintering ranges of English and Swiss Swallow Hirundo rustica populations: a stable isotope study JO - BIRD STUDY PY - 2003/11/01 AU - Evans KL AU - Waldron S AU - Bradbury RB ED - VL - 50 SP - 294 EP - 299 Y2 - 2024/09/19 ER -