悬崖燕在多年未见后重返圣胡安卡皮斯特拉诺，预示着春天的到来。 Cliff swallows are returning to San Juan Capistrano after years of absence, signaling spring’s arrival.

悬崖每年都会回到加利福尼亚州的圣胡安卡皮斯特拉诺, 在从阿根廷长期迁移后标志着春天. 它是太平洋飞行道350多种迁徙物种的一部分. Cliff swallows return annually to San Juan Capistrano, California, marking spring after a long migration from Argentina, part of the Pacific Flyway’s 350+ migratory species. 虽然它们在1990年代的翻新后消失了, 但最近在任务附近发现的物体显示部分恢复, Though they vanished after a 1990s renovation, recent sightings near the mission suggest partial recovery, aided by conservation efforts. 它们现在在人造建筑上筑巢, 而最广泛的物种 - - 小屋也在全球范围内迁徙, 其中一些群体使用了海峡岛上的洞穴. Protected under the Migratory Bird Treaty Act of 1918, they now nest on human-made structures, while barn swallows, the most widespread species, also migrate globally, with some populations using caves on the Channel Islands.