The one observation I made before finding the kittens. Almost all the colonies around the shore line were Myrmica, there was one rock that had a Lasius nest but there was also a nest of Myrmica under the same rock. There were a few Formica nests, but by far the most abundant species was Myrmica.
It's funny that I don't see more queens? As the nests were very healthy and most if not all had alates.
Myrmica nest more inland are less common in my area, they all seem to be close to the shore. The piles of shellfish remains left by birds made easy food for them, and lots of berry bushes for sugar.
The nesting medium was very dry and powdery, and I only found them under rocks.
I've been keeping an eye on them to see when they fly, but nothing yet.