Seib, R. 1985 Santa Rosalía to Isla San Marcos, Baja California Sur, México 5 May docile. I bagged it and moved on. I walked through a narrow wash and suddenly heard the sound of a lizard running up the gravelly hillside on my left. I shined my flashlight and saw that it was an adult ♀ Coleonyx switaki. I had no trouble grabbing it as it was not agile in the loose gravel. Moving through the canyon, I noticed the upright head of an adult Crotalus ruber 15 feet to my right. It seemed to be sitting in a hunting position, perhaps awaiting a mouse (I saw no sign of any mammal on the island.) I placed the snake in a five gallon bucket and moved on. I saw another C. switaki, a ♂, on the narrow floor of the wash. It ran into a crevice and I simply reached in for it. In this habitat they are quite easily caught. We found nothing else walking way up the canyon and turned back. Almost all the way back to camp I found a Lichanura trivirgata sitting in the sandy wash. It is a male, small adult. I am struck by the melanistic aspect of this animal: much black pigment in the ventral region, especially near the vent. We walked from 1800-2300.