Characteristics of the Barn Swallow populations used in this study with sample sizes for the genetic markers used in this study.

1Typical number of breeding cycles with maximum breeding cycles in parentheses.2Barn Swallows from Israel only move locally outside the breeding season.1. 典型繁殖周期数量，最大繁殖周期以括号标注。 2. 以色列家燕（Barn Swallows）仅在非繁殖季进行局部移动。