. Brigham Young University science bulletin. Biology -- Periodicals. BnicuAM VoiNo University Science Bulletin. I'ii;. 1. Prtcipitation for tlu- year 1965 plotted for each month. Dark columns represent Rainier Mesa and linctl columns are for Kock Valley. The symbol = iindicates onlv a trace of precipitation. Solid and broken liiiis plot the a\erage mavimum temperatures for Rainier Mesa for 1965 and 1966. iiiiliktiv that tlit'V exert appreciable on tile lizard population. No evidence has been found to indicate that mammals prey on the lizards. However, several species of mammals kno
. Brigham Young University science bulletin. Biology -- Periodicals. BnicuAM VoiNo University Science Bulletin. I'ii;. 1. Prtcipitation for tlu- year 1965 plotted for each month. Dark columns represent Rainier Mesa and linctl columns are for Kock Valley. The symbol = iindicates onlv a trace of precipitation. Solid and broken liiiis plot the a\erage mavimum temperatures for Rainier Mesa for 1965 and 1966. iiiiliktiv that tlit'V exert appreciable on tile lizard population. No evidence has been found to indicate that mammals prey on the lizards. However, several species of mammals known to occur in the area (Hayward 1965) have been reported to feed occasionally on lizards in other areas. Coyotes are known to eat vvcsteni fence lizards (Leach and Frazicr 1953; and Ferrel, Leach, and Tillotson 1953). Badgers are also known to eat lizards, although the records are for species other than S. occidentaJis (op. cit.). Foxes, l)ob- cats, skunks, weasels, and possiblv even cougars may occasionally prey upon lizards. A shrew killed and ate one of the lizards while they were together in a can-trap. Perhaps shrews kill lizards in nature especiallv if the shrew sliould lind the lizard in its hiding place when it is cold and toipid. A shrew was taken alive to the (>ivil Effects Test Operations laboratorv in Mercury, Nevada, and kept alive for about a month. It showed the ravenous appetite for which shrews are famous, but would not kill and eat lizards as long as crickets or other insects were axailable for food. We therefore doubt that shrews prev on lizards in southern Nevada. Jerusalem crickets, Stcnojx' fusctts, killed and ate several lizards in can-traps, and others were badlv injured bv this predacious insect. In Stenoj)eImatus\ we have a possible predator of S. occidentaUa in nature, but we have no evidence to show that this insect would kill and eat lizards under circumstances other than the unnatural confineinent of the two ani- mals in can-traps. Ants
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