Perhaps the most exciting times to bird for the experienced birder are during spring and fall migration. In the spring charasmatic and colorful birds like Lazuli Bunting, Black-headed Grosbeak and Western Tanger on their way north make ephemeral visits to places as far away as Alaska, and as near as neighboring counties. The intact habitats of the Lobos Valley would historically have been breeding grounds for many of today's migrant species and their songs sometime suggest they find it reminiscent as well. Flycatcher, Western Kingbird, Blue Gray Gnatcatcher, Cassin's Vireo, MacGillvray's Warbler, Black-throated Gray Warbler, Chipping Sparrow, Lark Sparrow and Bullock's Oriole. Vagrants can come from as far away as Asia or Latin America, although most of the ones seen are from the eastern part of this continent.
Vagrants can occur at any time of year, however they are most common in fall.
The taxonomic order in this list is a rough and abbreviated one. It probably will not exactly match the order in your field guide. This is a private site and is not endorsed by or affiliated with the National Park Service, the Golden Gate National Recreation Area or the Presidio Trust. Any mistakes are mine.