Guadalupe fur seals (Arctocephalus townsendi) have established a second haul-out in the Gulf of California on El Farall on de San Ignacio Island, along the mainland coast of Mexico (Figures 1 and 2). Unlike the smaller, seasonal site first used in 2019-2020 on Las Animas Islet (Figure 1; Elorriaga-Verplancken et al., 2021), Guadalupe fur seals appear to have been using El Farall on since 2014. In 2020 there were 492 fur seals present at El Farall on in January, and 771 in November-the majority of which were juveniles. The discovery of this new haul-out at El Farall on de San Ignacio Island brings the total number of sites where this species of fur seal is known to rest and breed to just four. With only a single breeding colony (rookery) on Guadalupe Island, Guadalupe fur seals remain vulnerable and may require additional protections in the southern Gulf of California to secure their future.Guadalupe fur seals were hunted for their furs and declared extinct in the late 19th century. It was therefore an unexpected surprise when 14 individuals were discovered in 1950 on Guadalupe Island (Hubbs, 1956). Since then, the population has grown and began hauling out at a second location (San Benito Islands) in the late 1990s (Maravilla-Chavez & Lowry, 1999). The San Benito Islands were a former breeding area in the 19th century, and are currently a large and well-established resting colony (haul-out)-with small numbers of births occurring during the annual breeding season (June-August; Gallo-Reynoso, 1994; Figure 1). However, numbers of births have been too few to classify this site as a rookery.

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