Most bands are usually made of light materials, such as aluminum or plastic, but for long - lived birds or those in saltwater environments, stainless steel or other noncorroding materials are used.
छल्ले लगाने के बारे में यूरोप, साथ ही कनाडा, अमरीका और दूसरे देशों में भी ऐसे ही कायदे - कानून हैं ।