How to properly search for snakes near a dune

If you remember, I was trying to look for water snakes (N. tesselata). After waiting for 15 minutes, these timid snakes started slithering right next to me. But now, besides water snakes, I want to find other snakes. Recently, I was walking along a trail to the largest sand dune in Europe.

I only found two crushed snake carcasses. After that, I had two questions:
What’s the best way to look for snakes - walking along the trail, or should I cross to the other side of the river and look there?
And how exactly should I look for snakes?
I’ve heard that you should turn over rocks and look in the bushes.

Hi @ksenosnake,

Here’s a helpful guide that I shared in another thread:

I’ve never been to a dune in Europe, but I like traveling to dunes in the US southwest. Basically, it’s just really difficult. I visited several dunes a few months ago and all I found were sidewinder tracks. I’ve had my best luck with dunes on warm nights.