I think it’s all animals. Halachacally Speaking by R’ Moishe Dovid Lebovitz brings down a machlokes. I’ll try to copy and paste it, or if you want you can google halachically speaking and find it in the archives on the website so you could see it yourself.
Visiting a Zoo
Shlita).
However, others are lenient with this. Bunei Beischa page 332, Opinion of Harav Felder Shlita, see Ashrei Yiladito page 31:footnote 25 who is lenient