The only explanations I can think of:
- someone set a special spawner or custom spawner to spawn griffins
- someone admin spawned one in
- someone changed server spawn settings
- another mod caused it to spawn
- mod did not download or install correctly and became corrupted, therefore causing weird issues.
- maybe wildcard added them to spawns on the island.

Thanks for the quick reply. I hope the answer to this mystery is that wildcard added them to the island. Any of the others just don't click. I run the server. I only play with my friend and my wife. Either another mod spawned in the griffin or my friend lied about "finding" it, and I have a hard time believing that because there's no reason to.

The only mod I have that has anything to do with creatures is Rare Sightings, but they take existing creatures and upgrade them to "rare", not spawn in new creatures. I'm not even going to bother posting over there about it though, because the dev is a.... well let's just say they're absolutely no help at all.

I know this is an old post, but Rare Sightings can most definitely spawn in Griffins. There's a small chance along with any upgrade that it'll turn into an Exotic creature (meaning a dino from another DLC). I believe these are on by default.

引用自 Nettle：

I know this is an old post, but Rare Sightings can most definitely spawn in Griffins. There's a small chance along with any upgrade that it'll turn into an Exotic creature (meaning a dino from another DLC). I believe these are on by default.

Thanks for letting me know!