South American mammals in West Europe vs USA/Canada

[Westcoastperson]

Little bit of digging and I'm guessing this is it:
neotropical otter - ZooChat

Also note the title of Neotropical Otter, not Marine.

Yes that was the comment thread, my mistake.

 

[StellarChaser]

First, some European countries have overseas territories in Latin America, like French Guiana, their zoos can easily acquire species from these territories. By contrast, US has overseas territories in the western Pacific so US zoos have Mariana Doves, Guam Rails and Guam Kingfishers that European zoos probably don't have.
Second, Canadian zoos have relatively poor collections overall, even Giant Anteater and Lowland Tapir are kept by only one institution in Canada. So it is basically US alone vs entire West Europe.

 

[TNT]

First, some European countries have overseas territories in Latin America, like French Guiana, their zoos can easily acquire species from these territories.

Coincidentally, you've made a similar point to what I was going to make - This is quite noticeable with French zoos and many African species.