User BlackTiger5 (DeviantArt) surprised me with a massive submission of 103 animal photos, free for the entire community to practice with! These were taken between 2019 and 2020, and features a very wide range of creatures, including elephants, ostriches, chimpanzees, nutria, seals, birds and more.
These are now in the animal study tool for everyone to enjoy. Here are a few example photos from this set:
Wow!