I remember catching spadefoot toads in a pond near the penasquitos slough when I was a kid.
We would catch the poliwogs, and raise them to froghood.
The red diamondbacks would lay in the pickleweed and feast on them. I know this because one morning, I waded into five or six of them without seeing them because of their incredible camo.
I think I was ten or eleven, and it was early in the morning. I was by myself, and I was already in the middle of the marsh area, standing in the pickle weed.
I bend over to look for tadpoles, and I see one snake, coiled, and cold in the morning dew.
It was unmistakably the copper hue of crotalus ruber ruber, and my foot was within inches of it.
Thank God the sun hadn't warmed it up yet.
I started to step away, when I noticed another one not two feet away, then another, and another.
I had waded into a red diamondback mine field. They were everywhere.
How I didnt step on one may have been sheer luck, or providence, I dont know.
Today, that spot is "protected".
There are no more spadefoot toads because the state, in its great wisdom, opened the channel and allowed brackish water to infiltrate the habitat, which completely wiped them out.