January of photo-pyro vs rock: sun was always filled with halo, but strong enough for shadows. Match iron down sometime before 820. Inside shed wall, little activity. The surface temps were taken with thermocouple under several layers (3+4) of masking tape with a wad of cotton between 2 layers. Some of these surface readings were drifting, hence not too reliable. Lizard #1 weighed 20 g, Lizard #2 weighed 16 gram. The rock lizard #2 ran 3.9° to 6.6° colder than the pyro lizard, #1 when switched, at the end, #2 after 5 minutes on the rock was 1° cooler. Calibration of thermometers. Temp J.W OFT per 20 clicks J W1 - 39.2° 38.6 6.6, 6.5, 6.6, 6.6 [illegible] seconds per 20 clicks 38.6 no go J W2 - per 20 clicks OP1 - 37.5 4.7, 4.6, 4.6, 4.5, JW1 32.5 11.4, 11.0, 10.8, 10.8, 10.6, 10.7 32.0 OP1 32.0 6.2, 6.1, 5.9, 5.9, 5.8, 5.8, 5.9 31.9 JW1 22.8 23.5, 23.4, 23.4 23.0 OP1 23.0 9.4, 9.2, 9.1, 9.0, 9.0, 9.0 22.7 (per 10 clicks) J.W1 16.8° 21.3, 21.2, 21.1, 21.1, 17.0 17.0 20 clicks OP1 12.2, 12.1, 12.1. When I went back after lunch to re-run the photo equipment, the sun had moved so as to put the area in shadow, soldier thermometers and calibrated them, but had to wait for colder weather because the river water at 1012 pm was up to 16°. Hunted lizards in cloudy-sunny afternoon, but saw only females or juveniles (but saw 1 baby). Sky at least 2/3 clouds all day.