Breeding of White-fronted Swift Cypseloides storeri in Michoacán, Mexico

White-fronted Swift Cypseloides storeri is a poorly known species whose nest has not been described. Here I provide details of two nests, found in June 2022 near Tacámbaro, Michoacán, Mexico. The data from two breeding sites, each at a waterfall with a single nest, indicate that the breeding season commences at the start of the rainy season. I inspected the contents of one nest which held a single nestling; this coincides with clutch information for other Cypseloides. Both nests were in the spray zone near vertically falling water and were protected from above by a rock roof. Photographs of adults at the nest show that the diagnostic facial marks are brighter than illustrated in field identification guides.