My trap consisted of two six-by-five aluminum frames with hundreds of vertical fishing lines strung between them. It looked like a harp, but with adj… - Merlin Tuttle

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My trap consisted of two six-by-five aluminum frames with hundreds of vertical fishing lines strung between them. It looked like a harp, but with adjustable legs to support it a few feet off the ground and a canvas bag hanging below to hold captured bats. This device, which I had recently invented, was capable of catching thousands of bats per night, enabling me to sample and release large numbers without harming them.