Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
"Faster than a speeding bullet, but slower than an angry gopher snake."
After landing on Earth Ursa, an evil superwoman from planet Krypton, is walking in some woods next to a lake with her villianous super companions General Zod and Non. She sees a gopher snake and picks it up out of curiosity saying "Primitive sort of life." (She was probably an evil super-biologist on her own planet.) The snake turns around slowly and bites her on the arm. She throws the snake to the ground in disgust and burns it to death with red rays that come out of her eyes. She's surprised at her new eyeball death-rays and declares "I have powers beyond reason here!"
The snake used here is a harmless gopher snake, not a venomous snake, but in the movie universe all snakes are deadly, so we're probably supposed to think that it's a deadly snake. But there's nothing in the movie that indicates she was bitten by a venomous snake or even that the bite caused her any pain, which it wouldn't since she has impermeable super skin, so I think Ursa was simply offended that a puny primitive creature would dare try to attack her and killed it out of indignation.