No, the carrier pigeon anklet is customized by the carrier pigeon association. According to the inquiry of carrier pigeon association in official website, the carrier pigeon anklets in 2 1 Holland are grass green. So 2 1, the foot ring of the Dutch homing pigeon is not purple. Carrier pigeon is an animal flying in the air, so its shape must meet the requirements of flying in the air. That is, the flight resistance should be small, the balance control ability should be strong, and the flight time should be long.