K Dixon 1951 Parus atricapillus 17. Mch. 1 Santa Ana Wildlife Refuge, 7 mi. S Alamo, Hidalgo, Texas ready to jump down their neighbor's throat should he dare trespass. The bird I saw first gave see si vet once but no further action so I left at 8:05. At 8:50 see si vet vet from tree at S end of backyard grove. Notes sit from farther north & steadily see si vet vet from area W of tree 'B' Latter bird continued to call after 9:00 long after first bird was silent. At 9:15 I circled the edge of the clearing moving W from S end of grove. At 9:20 I encountered what I thought was pair of Pine Siskins in mesquite due N of Tree 'B' toward edge of mecca. There was in reality 2 pairs having a dispute. One bird moved toward a second not rapidly, just a hop in its direction. The second bird retired to a shrub & flew away. Male of first higher in tree scolded vet vet vet which was answered by mate of second, farther to S W. First bird moved toward second pair (ie: SW) as two males continued to call. At 7:21 this bird retreated in part I think at approach of second but also as Sharp-shinned Hawk swooped them through the mesquite here is about 15 feet high). High-pitched, thin see-see-see for 20 seconds especially by what I took to be the 'second' bird. This individual then foraged, called sit sit interspersed by see see notes occasionally. At least two birds had given this "fear call," hardly a confusion clone however. The first pair settled to the East to Tree 'A' & the two birds were working S at