How do you tag juvenile iguanas?

The San Diego Zoo uses colored bead tagging

Yea they were apparently using this method but when you have 190 hatchlings or more each breeding cycle you begin to run out of colors, that why we need something big enough to put special numbers.

Sorry. I can only think of flippant answers. Is this really the place to ask such a question? Silly me. Of course, it is. Somebody here knows something about everything

Add a ninth color and use two tags instead of one.

Would it be feasible to use RFID tags? They are sometimes used to tag pet iguanas. Maybe in conjunction with a single visible color marker to show that it has been tagged?

Pit tags are used in fish

wait, you have to kill them later, damn

Another thing is like @thorninmud said, use passive RFID tags, they are small, cheap and easy to get.

[mod says] This is our Question of the Day!

@thorninmud Are RFID tags the same as the chips they use in dogs now? Or would that be too expensive?

You could use the same technique as the bead tagging but use numbered tags.

@Adirondackwannabe Right, same thing. I’m having trouble finding cost info. Here’s a company that markets RFID products specifically for biological research. They might be a good source for information.

Thanks for the ideas guys, unfortunately I think the RFID tags may be too expensive for this facility. It already costs a lot just to get things out to this island once they arrive on the Honduras mainland.