Wiktionary
bal-chatri
Etymology 2 n. (context falconry English) A trap for catching hunting birds, consisting of a cage with bait and a slip noose.
Wikipedia
Bal-chatri
Bal-chatri (/bɑːl tʃʌθri/) are traps designed to catch birds of prey (raptors). The trap essentially consists of a cage baited inside with a conspicuously visible live rodent or small bird, with a series of monofilament nooses attached to the surface to snare the legs of a free-flying raptor that attempts to take the bait. The name is derived from the Hindi word used by trappers in India. Modified bal-chatri traps are also used for catching shrikes.