8. Feb 27. Santa Ana Wildlife Refuge, 7 mi. S Alamo, Hidalgo Co., Texas his crest was shining black. He called sit sit & steadily & at 1:13, "his" mate flew across road to large pod tree [Pithecolobium] beside road & N of his position. The second bird appeared to have a duller crow and foraged in Spanish moss clumps a great deal, moving from one to another of these (in a tree with fresh leaves). This bird and its mate moved N to next tree on W side of road and foraged there. I was writing notes at 1:25 when I heard calls such det det. I saw four towhice in a dead tree at 45° angle across road, 20 ft N of S end of road. One bird flew back across to tree where pair I had been watching was foraging (also a large pod tree). One jet black crested bird seemed to be chasing brother out hopping after him and calling vet vet vet and once I heard siclode dee (from him?) His mate? perched higher in tree & looked away. The third bird called vet vet vet all the while but moved back cross road and foraged in tree with mate. He continued to call after the other had ceased - vet vet vet nasal. All quiet by 1:30. At 1:35 the one & mine was foraging in tree where they had been at 1:13-145. This bird then flew across road to tree occupied at 1:05. Mate in same tree called see sa vet vet over & over sometimes see sawer --- --- This bird then stopped calling even though I stayed a few feet from him. I left at 1:50.