Use ordinary aluminum core wire and wrap it around an 8mm or 10mm steel bar. You can wrap it around many times and use a hacksaw to cut it in the direction of the steel bar. When using, break it open, put on the pigeon's feet and break it back.

Aluminum core wires do not come in many colors, they can be divided according to color.

You can also use the same color with different legs to separate them. You can also peel off half of the outer sheath of the wire and separate the left and right leg straps. Telephone cords can also be used, don’t they have two small strands in them? Just use these two small strands.

I started making anklets like this when I started raising them. Now there are more than 1,000 pairs and it’s a bit messy. I’m selling pigeons. You can buy those kind of plastic anklets at the utensil store. They are movable, just open them and pinch them tightly. They also come in many colors. I used white ones first, numbered them with an oil-based pen, and then put a layer of transparent tape on them, waiting for the pigeons to match. When it is best to cage, just put the pedigree on the cage, take off the plastic anklets, wash them clean and reuse them.