Observation notes: about 55 deg. overcast. vernal pool habitat with large Oak over-story. I kicked this butterfly our of wet grass while surveying birds. She was too cold to move after she landed. She looked small. I thought she would be an Acmon Blue, until I looked closely. I didn't see any legumes around. only other butterflies were relatively slow-flying Vanessa cardui still moving north. Just guessing on Western.