Parus bicolor [actually 15 mi. W Bastrop, IN Bastrop Co., Texas] Apr 8 7 mi E Delvalle, Travis Co., Texas behind us at 5:0# then flew S across the road. We moved to a point 20 ft or so NW the mesquite with brush clump and at 5:06 a bird flew in from due S. and entered cavity in mesquite trunk. It appeared at the opening with fecal sac in bill; crest gray. 5:10 bird leaving nest (approach from SW) with gray crest, black forehead. + 5:15 as at 5:10 5:25 bird flew from SW and entered nest directly not via several perches in shrubbery as bird had done on preceding visits. Forehead black. Bird removed fecal sac. - 5:41. Bird reached nest indirectly (via shrubbery) Black of the forehead seemed duller than that of preceding visitor 5:52 as at 5:41 We moved over to inspect the nest - at odd intervals we had heard calls of young inside from 20-25 feet away. Cavity in somewhat inclined mesquite trunk 5 1/2 ft above ground. Entrance screened by hackberry sapling (which may not have been in leaf when nesting began). Shrubs beneath mesquite included Berberis trifoliatum (=my #410), Opuntia, Mexican persimmon (fide Rinkaid) The parent bird or birds did not forage in the mesquites while we were there but always flew S to the woodland across the road. My impression