Songbirds can benefit from natal philopatry through prior knowledge about site-specific resources and local adaptation to environmental conditions. Likewise, breeding experience may also play a role in reproductive success. However, for birds that breed in managed habitats, management activities may overwhelm any potential benefits of philopatry or breeding experience. We examined the effect of site fidelity on reproductive success in 1,823 bobolink and Savannah sparrow nests in agricultural grasslands in Vermont, USA. From 2003–2019 we monitored the nests of 51 female Savannah sparrows and 72 female bobolinks that returned to breed on or near fields in which they hatched between 2002 and 2018). Using program MARK, we found that daily nest survival (DNS) differed between species and grassland treatment types and was not affected by philopatry. Bobolinks had greater DNS than Savannah sparrows, and DNS was generally greater on late-hayed fields than either early-hayed fields or rotationally-grazed pastures. Our results show that despite the potential for increased fitness through site fidelity or breeding experience, agricultural management has an equal or greater influence on female reproductive success. © 2021 The Wildlife Society.

中文翻译：

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管理计划，而不是 Philopatry 或育种经验，影响了佛蒙特州海菲尔德鸣禽的筑巢成功

鸣禽可以通过对特定地点资源和当地对环境条件的适应的先验知识，从出生的亲缘学中受益。同样，繁殖经验也可能在繁殖成功中发挥作用。然而，对于在受管理栖息地繁殖的鸟类，管理活动可能会压倒慈善或繁殖经验的任何潜在好处。我们研究了现场保真度对美国佛蒙特州农业草原 1,823 个 bobolink 和萨凡纳麻雀巢繁殖成功的影响。从 2003 年到 2019 年，我们监测了 51 只雌性萨凡纳麻雀和 72 只雌性波波林雀的巢穴，这些麻雀在 2002 年至 2018 年期间在它们孵化的田地或附近繁殖）。使用程序 MARK，我们发现每日巢穴存活率 (DNS) 因物种和草地处理类型而异，并且不受 philopatry 的影响。Bobolinks 的 DNS 比萨凡纳麻雀的 DNS 大，而且晚干草田的 DNS 通常比早干草田或轮牧草场的 DNS 大。我们的结果表明，尽管有可能通过场地保真度或繁殖经验来提高适应性，但农业管理对雌性繁殖成功具有同等或更大的影响。© 2021 野生动物协会。