Could be too early in the season to see them. They are there. They could only be eggs at this point.

if they are the small keeled slugs they live in the soil and under pots. they emerge in the dark feed and go back into the soil before sun up. But if there is little for them to eat then they wont hand around waiting for food.

They are active here in the UK, sadly it hasn't been cold enough to see off any pests. the lily beetle are also active.

Thanks B, but there was only the odd one or two for the past 2 years. I’m delighted of course but wondered why, after the huge numbers we used to have.

Perhaps your veg leaves are tougher than the delicate flower ones were! I don't suppose slugs will care much for onions. Come to think of it I haven't seen any either - except for two tiny baby ones hidden in a leek.
Also it has been very dry this Spring. When it starts to rain again I bet they'll be out in force...

Weird innit ? I had no more than a handful all last year.

They were here with me Hank!

You’re welcome to them S, even those few.