Jeremiah 16:16 - Albert Barnes' Notes on the Bible

The scattering of the people is to be like that of hunted animals, of which but few escape, the ancient method of hunting being to enclose a large space with beaters and nets, and so drive everything within it to some place where it was destroyed. The destruction of the whole male population was one of the horrible customs of ancient warfare, and the process is called in Herodotus “sweeping the country with a drag-net.” The same authority tells us that this method could only be effectually carried out on an island. Literally, understood, the fishers are the main armies who, in the towns and fortresses, capture the people in crowds as in a net, while the hunters are the light-armed troops, who pursue the fugitives over the whole country, and drive them out of their hiding places as hunters track out their game.