Hi!

So I caught a garter snake today and while I was holding it, a red thing came out of it's cloaca.


1be7d8195f.jpg1be7dd514b.jpg1be7e26e45.jpg

I have 4 other captive bred garters, and I've never seen this before. Also, it's head is a lighter brown, whereas the other 4 have black scales on their heads. Is this a male? What is the red thing?