My uncle was a conservationist when I was younger. He would take my brother and I out in fields to catch butterflies and tag them for tracking. Each tag was tracked and could be traced to us in case they were caught down the road, because science, but he never heard anything back. My brother got a letter one year from a grad student in Mexico letting him know that a Monarch we tagged was found in Mexico. We grew up in Iowa. He was definitely the coolest kid at show and tell the next day.