KDixon 1951 Pamus atricristatus 27. Mar 3. Santa Ana Wildlife Refuge, 7 mi. S Alamo, Hidalgo Co, Texas other then flew into tree NW "C" and gave sit calls and see such dit, mostly the sharp fait 7:44 one bird in "A" xi velvet - other in tree S of "A" - contact notes only. Former moved into row of mosquite leading NE. I lost track of second bn at 7:49 and titmouse in ebony N of house & no calls from any other position (location notes only) DEAD CALM. March 5. Harlingen, Cameron Co., Texas . Mr. L. Drby Davis told me that the Black-crested Titmouse in this area does not flock in winter. He and Mrs. Davis stated that only on rare occasions had they seen more than 3 or four titmice together at one time. Mr. Davis said further that whenever he heard a titmouse call, he followed it up and located the birds, for other passerines tended to follow the titmice. Thus a titmouse call might indicate a mixed flock which would include wintering warblers as well as kinglets and vireos. Mr. Davis also said that this &tmouse may nest close to the ground and that he had seen one nest in an exposed position in a stump (a cavity incompletely roofed over), roofed over but not completely walled in). This species is widespread but not "common". He has noted no change in its frequency of occurrence in this area.