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The closely related avocets swing their recurved ( upturned ) bills back and forth along the surface of the mud . The narrow valley flood plain along the Rio Grande was ideally suited for irrigation agriculture , which provided the key to survival in this arid region . Slough 's 900 soldiers would proceed west along the Santa Fe Trail and block Glorieta Pass , while Chivington and Lieutenant Colonel Manuel Chavez of the New Mexico Volunteers would take 450 men over Glorieta Mesa to attack the Confederate right flank or rearguard . It would be fought mainly in Baghdad and the swath of central Iraq dominated by Sunni Muslims that stretches north along the Tigris and west along the Euphrates – in shorthand , the Sunni Triangle . Move the flashlight back and forth along the rim and follow the light that appears on the rim of the other side . About dark the regimental commander ordered a company to move west along the river and outpost Heiderscheidergrund ; admittedly this was poaching in the zone of the 26th Division , but the bridge there was needed . He works at the National Energy Technology Laboratory , which is headquartered in Pittsburgh and Morgantown , W.Va. Shuttle vans run lab workers back and forth along the 65-mile route three times a day . The hazard rating sometimes varied substantially along a segment . Here it leaped futilely a half dozen times for the top of the palisade , and then trembling and chattering in rage it ran back and forth along the base of the obstacle , just as a wild beast in captivity paces angrily before the bars of its cage . The ocean is behaving strangely along the west coast in the latest of a string of unusual years , with scientists reporting crashing bird populations off California for the second consecutive year and hiccups in the nutrients that feed marine life off Oregon . By the early 1840 's small frontier trading posts sprang up as frequent caravans moved west along the trail . They even succeeded in ambushing enough vehicles , passing back and forth along the road , to promise motorization of the brigade 's bicycle battalion .