‘The Niffler is back… and might have babies’ - interview with the The Crimes of Grindelwald cast

From Comic-Con 2018 panel.

https://www.pottermore.com/news/all-the-action-from-the-fantastic-beasts-the-crimes-of-grindelwald-comic-con-panel
https://www.pottermore.com/news/the-niffler-is-back-and-might-have-babies-interview-with-the-fantastic-beasts-the-crimes-of-grindelwald-cast