Four cormorants atop snags in the pond fronting a heron rookery.
Park of a heron rookery located on the western edge of the pond.
Don't know my Danish herps, either. This one was TINY - 1-1/2" max. Found about 25m from a large-ish pond, making his way through the grass on the opposite side of a footpath.
Nuisance - if not invasive - in Denmark