I like the idea. Swarms of underwater lionfish hunting drones. Or Zebra Mussels in the great lakes. Or Asian Car in the Mississippi and Ohio rivers.
Or how about swarms of small farming robots scurrying around a cornfield picking pests off plants and digging up Gypsumweed.
And Marching columns of robot ants marching over the mountains of West Virginia selectively pulling Wild Garlic Mustard.