From 6 to 9 June 2016 Ruiz-Campos and León-Girón participated in a biological exploration of the Sierra La Asamblea, an isolated mountain range in the central desert of Baja California, lying about 25 km east of Laguna Chapala and about 65 km northwest of Bahía de los Angeles. Reaching a maximum elevation of 1661 m above sea level, the Sierra La Asamblea can be considered a sky island, having some plant species characteristic of transitional chaparral such as Rhus ovata (sugarbush), Juniperus californica (juniper), Ephedra californica (California ephedra), and Simmondsia chinensis (jojoba) as well as plants more typical of the lower surrounding desert such as Brahea armata (blue palm) and Prosopis glandulosa (honey mesquite). The plants of the Sierra Asamblea have been surveyed to substantial degree by Bullock et al. (2008), but our visit in June 2016 was the first by biologists focusing on birds.