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Showing posts from April, 2026

The “Morning Flight” at Refugio Canyon

 Some 40 years ago, birders at Cape May in New Jersey discovered a ‘morning flight’ during which warblers and other “nocturnal” migrants migrated from the Avalon Peninsula back towards the Delaware coastline in the first two to three hours of daylight. A similar flight was discovered around that time at Butterbredt Spring in Kern County in the Mojave Desert of California. For a long time, the phenomenon was believed to be confined to a few locations but the discovery of another large morning flight at Bear Divide in eastern Los Angeles County heightened interest elsewhere in southern California and birders began to discover additional sites. Starting In spring 2018, I began spending more time in Refugio Canyon, about 13 miles west of Goleta, during periods of strong northwesterly winds as local birders had become aware that larger numbers of western migrants sometimes occurred in such conditions. One motivation of course was to find rarities but there are many western migrants, i...