Sentence:  As we arrived at the grainfield a covey of little Mexican boys swarmed in from all directions, waving and yelling and climbing on the bumpers, vying for jobs as bird <WSD>shaggers</WSD>. Birds were darting low over the vehicles and somebody got excited and started shooting right there, bringing the kids racing for the fallen birds, because whoever got one had a job for sure. 
Meaning of the word marked with <WSD> tags:  One who catches and returns a ball, usually out of play; one who fetches played balls; one who fetches shot game.