Since Guam has a number of military bases, could the soldiers be lined up and marched across the island to catch the snakes?
Again, the snake habitat would make this extremely difficult, especially for people untrained in locating and dealing with snakes. Snakes are rarely encountered except at night, and even then many elude detection because they are high in trees, in dense vegetation, and or in places that are difficult to access. Additionally, private property, military security areas, and all sorts of situations would be inaccessible to human hunters. Also, because snakes have slow metabolisms and eat fairly large meals infrequently, even if every single foraging snake could be collected in one sweep of the island, many times the collected number could be expected to remain including the generally inactive gravid females.