Dinothrombium spp. (Velvet Mites)
After the summer monsoon rains start, it is pretty common to find large red
mites stumbling across the landscape. They look like bright red feather
dusters, and are spectacularly large when compared with most other mites.
The mites spend most of the year underground. The bright red color is most
likely a warning - I've read that the mites taste pretty bad (here's
an article about a fellow who actually tasted one).
According to the information
website, the Velvet Mites primarily eat winged
termites that are emerging for their nuptial flights.