I want to thank everyone for the advice and suggestions. Just reading
all the replies gave us the confidence to be not scared of the snake.
We got the vents repaired and will deal with the source of the problem,
aka the mice. There was evidence of the presence of mice since they
had dragged in the sunflower seeds meant for the birds that we love into
the crawl space. This was a great lesson in how the food chain works in
nature.
wrote:

While working in the garden this afternoon I came across a 3-4ft black
snake. I do not know if it was just a garden snake or is poisonous.
Anyway, I tried to get it away from the vent which is about 6 inches above
ground leading to the crawl space. The snake went into through the vent
into the crawl space. Does anyone know hot to get it out and prevent
further intrusions. Is there a chance it was poisonous? Who can we call
for help?



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