Like snow on saguaros, this too is an unusual sight. (Photographers go for the exceptional rather than the mundane.) This was at the end of a very wet winter, and this arroyo adjacent to the Desert Museum flowed like a mountain trout stream into June. In a normal year it carries water only for an hour or two during summer downpours, from zero to a couple of times each year.


Retrieved from the Arizona-Sonora Desert Museum web site on 08-16-2022
http://desertmuseum.org/desert/habitats_AZUTucsonMts08.php