I visited the zoo again in late October. I was lucky to have really warm and sunny weather. The place is truly amazing to visit in autumn, with the tall trees showing beautiful colors. From the upper part of the zoo, you can see the hilltops of the Black Forest in the distance.
A fun fact I didn't know before is that the zoo is located in the more affluent neighborhood of the city (the Rebberg), where all the industrial era bourgeois built their mansions. The rest of the city looks really decrepit in comparsion (Mulhouse overall suffers from a poor image in Alsace).
Just like in my previous visit, there are 4 sifakas on exhibit at the moment (the parents and two of their offspring). They truly are a joy to observe... I feel like pictures don't do them justice.
I was able to see the young sand cats born earlier this year. On the other hand, the zoo apparently doesn't have manuls anymore.