My friend NUTTALL’s account of this Titmouse is as follows, “We first observed the arrival of this plain and diminutive species on the banks of the Wahlamet, near to its confluence with the Columbia, about the middle of May. Hopping about in the hazel thickets which border the alluvial meadows of the river, they appeared very intent and industriously engaged in quest of small insects, chirping now and then a slender call of recognition. They generally flew off in pairs, but were by no means shy, and kept always in the low bushes or the skirt of the woods. The following day I heard the males utter a sort of weak monotonous short and quaint song, and about a week afterwards I had the good fortune to find the nest, about which the male was so particularly solicitous as almost unerringly to draw me to the spot, where hung from a low bush, about 4 feet from the ground, his little curious mansion, formed like a long purse, with a round hole for entrance near the summit. It was made chiefly of moss, down, lint of plants, and lined with some feathers. The eggs, six in number, were pure white, and already far gone towards being hatched. I saw but few other pairs in this vicinity, but on the 21st of June, in the dark woods near Fort Vancouver, I again saw a flock of about twelve, which, on making a chirp something like their own call, came around me very familiarly, and kept up a most incessant and querulous chirping. The following season (April 1836) I saw numbers of these birds in the mountain thickets around Santa Barbara, in Upper California, where they again seemed untiringly employed in gleaning food in the low bushes, picking up or catching their prey in all postures, sometimes like the common Chickadee, head downwards, and letting no cranny or corner escape their unwearied search. As we did not see them in the winter, they migrate in all probability throughout Mexico and the Californian peninsula at this season.” According to Dr TOWNSEND, “the Chinooks name it _a-ha-ke-lok_. It is a constant resident about the Columbia River; hops about in the bushes, and frequently hangs from the twigs in the manner of other Titmice, twittering all the while with a rapid enunciation resembling the words _thshish_, _tshist_, _tsee_, _twee_. The irides are bright yellow.” PARUS MINIMUS, _Townsend_, Journal of Acad. Nat. Sciences of Philadelphia, vol. vii. p. 190. Adult Male. Plate CCCLIII. Fig. 5.