In southern Arizona, here, there are some mosquitoes in the city and the farmlands, but the desert is free. That was a strong part of my choice of domain. The ones in the city are relatively new. The water company tried an experiment with reeds and...now we have West Nile virus. Indigenous "kissing bugs" get sleeping people in the evenings at certain times of the year. For some reason, they have never gotten around to naked me.
We have very potent scorpions, but covering bare feet at night, when it is cool and they come from under their shelters. They are defending themselves. Soles have to be covered, most of the time, especially the hot days.
It would sometimes seem that everybody on the desert is out to get you, especially a beginner. I have learned to coexist. The prickery, scratch, biting problems that I refer to are the rattle snakes, but mostly, nearly every plant has protections. Talk with the plants, respect them, try not to disturb them and things work out, with awareness.
Over 90% of the riparian areas in the state have been destroyed, by development, by well drilling, dams for cattle, or the cattle themselves. The major concern in a pond is who is stomping mud or defecating up stream. Standing water gets iffy, especially when it is warmed. We have to get fresh rain, go to larger rivers, or get too high in the mountains, on federal reserved lands generally, to consider a swimming hole away from the cattle's destructive influences.
Many years ago I was skinny-dipping with a couple in a slow river deep in the jungles of Ecuador. We got out and watched a hunter clean his days kill, dropping the bloody guts into the water. He lit a fuse on a ball of wrapped green reeds and threw it into the water where we had been swimming. After an explosion, he and his kids jumped in grabbing handfuls of dead piranhas, gathering them into a net bag. It would seem evident, at least in that region, that piranha get more excited about blood in their water, than willys.
Jbee