This story (
https://www.cnn.com/2021/08/24/world/giant-tortoise-eats-chick-intl-scli-scn/index.html) appeared in the news today. I'll summarize, so you don't have to expose yourselves to what you consider a noxious news source. A Seychelles giant tortoise ate a bird. This observation has been published in
Current Biology, a big time science journal.
Why I think this is abysmally stupid. I have pet tortoises. I could have told them the giant tortoises would happily eat meat if they could get it. Tortoises love savory food most of all. My guys get savory stuff once a week. Sunday I gave them some dog food (crushed, soaked, and mixed with greens). They love it. Most "vegetarian" animals will happily eat meat if they can get it, they need protein too.
There is a limit to how many animals a slow moving tortoise can hunt down, so they don't eat meat often. Indeed if they do they get a condition called metabolic bone disease. It doesn't hurt them much unless it gets really bad, but it is unsightly and very common in captive born tortoises. All my guys right now have at least a touch of it. My big female Ruby has it bad.
Not one of mine, this is an African spur-thighed tortoise with bad MBD, or pyramiding. By the way, these things live over 100 years, get to be 150 pounds and are commonly sold in pet stores.