>>4719346 lb

>Perhaps there is some grooming center on the opposite side of the border at some point..

monarch butterfly migration does move southward across border. see e.g. scene in movie Dallas buyers club. IRL Mexican state of San Luis potosi is known for monarch hordes during certain periods. matter of fact there's a place called butterfly castle. links related. DIG

https://land8.com/the-mysterious-castle-of-sir-edward-james-and-the-xilitla-garden/

https://www.google.com/search?butterfly+castle+san+louis+potosi