Methodology and Use
Contemporary traps are made of more modern materials, such as wire mesh cages with nooses made of nylon monofilament. The traps vary from 25–50 cm in diameter or length, with the nooses 4–12 cm in diameter. They are normally weighted to prevent them from being carried away by ensnared birds. The live lure, or bait, animals used for the trap are usually rodents such as house mice. The cage may have a double wall, or a removable roof or inner compartment, both to protect the bait animals from the raptors, and to prevent them damaging the nooses by chewing them.
The traps are designed to be highly portable and may be deployed opportunistically from a slowly moving vehicle on a roadside when a hawk or falcon is sighted perch-hunting from a pole or utility line along a road. They may also be used near nesting sites in order to trap a breeding pair. Active traps require continuous monitoring. Users require proper training; there are ethical considerations and the need for experience in the use of bal-chatris to avoid harming, and minimizing temporary stress to, the bait animals and the raptors caught.
Read more about this topic: Bal-chatri
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“One might get the impression that I recommend a new methodology which replaces induction by counterinduction and uses a multiplicity of theories, metaphysical views, fairy tales, instead of the customary pair theory/observation. This impression would certainly be mistaken. My intention is not to replace one set of general rules by another such set: my intention is rather to convince the reader that all methodologies, even the most obvious ones, have their limits.”
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