K Dixon 1951 Parus atricristatus Feb 24. Chisos Basin 5400 ft, Chisos Mts, Brewster Co., Texas Sunny day with a few thin clouds overhead. I arrived at campground area shortly after 11:00 am (Central Standard Time) and encountered Adnice in the juniper-pinon-oak area about 11:15. I heard a call see deh deh dup, the first note thin and high pitched, the next two nasal. The call is sharply and rapidly uttered. One telmoro which I couldn't see gave this call repeatedly while another foraged amid some vertical juniper trunks. Then both flew upslope to W to some other junipers. I watched them there briefly as they moved through the branches exchanging single soft notes sip rather frequently. Then about 11:20 the "see deh deh dup" call was given and they moved up onto the crest of the low ridge. I followed and located the two birds foraging in adjacent junipers beside a pinon. They were silent giving the note sip rarely. I watched one bird from about 10 feet away as it foraged on trunk and heavier branches. It appeared to be removing the tree plates of bark from the trunk for pieces of bark floated to the ground from time to time. Once I saw the bird pick up what appeared to be a larval insect. The bird I was watching gave the "see seh deh" call and flew downslope to an oak, flying from there to another oak(?) bush and thence to a pinon. The mate foraged in the juniper where it had been for a while, gave sip notes, but after perhaps