Berger and Mueller, THE BAL-CHATRI. January The bal-chatri is a hardware cl .oth cage covered with slip-nooses of the deposit and removal of bait. () used a bal chatri noose trap to capture barred owls. Thorstrom () reviewed the methodology used for capturing birds of prey in tropical forests. Baited. Our Bal-Chatri trap has been used and tested by many falconers. a double dome wire wall inside to keep mice or bait animals from chewing up the nooses.