As a formal research tool, says Smithsonian magazine, bird banding began in 1899 when Danish schoolteacher Hans Christian Mortensen “crafted his own metal bands, inscribed with his name and address, and placed them on 165 young starlings. ”
ज्या देशांमध्ये पक्ष्यांना कड्या बसवल्या जातात तेथे त्यासंबंधी अनेक नियम असतात आणि कड्या बसवणाऱ्‍या लोकांकडे सहसा परवाना असावा लागतो.