Don't want to kibbitz the course designers but I'm going to do it anyway: if you wanted to broaden the range of animal names on the French word list, it might have been more useful to seek inspiration from another French-speaking country, namely Canada, rather than Australia! Even more than kangaroos and koalas, I'd want to assimilate the French words for "moose," "beaver," "bison," "wildcat," "deer," "wolverine," "raccoon," etc, because they are much closer to home for me and others who live in what was once called Nouvelle France.
The word "kangaroo" or "kangourou" originated when European explorers asked the Aborigines what the strange hopping animal was called. The natives replied: "kangaroo" which means: "I don't understand". However, the explorers thought that that was what the marsupial was called.
Here is a dictionary to look words up in: https://dictionary.reverso.net/french-english/Kangourou
In red nm stands for nom masculin or masculine noun.