I was always taught to hold the snake behind the head, and that’s what I’ve done. If it’s in the wild, I hold the head down with a stick or other implement, then grab behind the head. Works fine. And the snake can’t possibly get its mouth to me, as it presumably could if I grabbed the other end.
Of course, I’ve never had to or tried to grab and hold a highly dangerous and aggressive snake like a mamba. In a case like that, if forced to, I might grab the tail, but only preparatory to swinging the snale in an arc to whack its head against something, a la The Gods Must be Crazy.
When I was a kid I went to see Dr. Haas at the Miami Serpentarium. Dr. Haas, who handled King cobras and other such agressive and venomous snakes, always grabbed them behind the head, then “milked” the venom into glass containers.
Just another note here re. snake handling. When I was growing up in California, I used to catch gopher snakes. They were aggressive mothers. If they didn’t bite you first and you held them right behind the head, they would throw the rest of their body around your arm and shit all over you. They also emit this horrid oily smell that’s hard to get rid of. We have a related species here in New Mexico, the bull snake. It’s also aggressive but they don’t seem to shit on you like gopher snakes do. Maybe it’s just a California thing. - Jill
I really doubt this is a serious problem. You’re supposed to hold it behind the head, gently but firmly. I suppose if you held the head itself in a power grip, you might damage some of the thinner bones. However, a snake’s skull, and the rest of its skeleton, is extremely flexible, so I really think you’d have to squeeze it pretty hard to damage anything.
If you are trying to transfer a snake between tanks, or into a bag, it would be appropriate to lift the snake’s body on a snake stick while holding its tail to prevent it from sliding off the stick. However, pulling a poisonous snake by the tail while hanging out of a tree seems to me to be irresponsible in the extreme.