Ever since he was a boy, Bunu Bukar has hunted big game in the forests of northeastern Nigeria, tracking the footprints of wild pigs, antelopes and elephants through the thick brush.
Now the prey he hunts leaves motorcycle tracks.
Mr. Bukar and dozens of members of a century-old hunting association have trained their weapons on Boko Haram, the Islamist militants who have shot, kidnapped and burned their way through villages on an eight-year campaign of murder and destruction across the region.
Nigeria has marshaled huge battalions of soldiers to carry out a sweeping operation to attack and kill the insurgents, who have since retreated to remote forest hideouts.
Fed up with Boko Haram’s mayhem, civilians have formed vigilante groups to join the fight.