We went for a long walk to the Hald ruins, and a tower there which was still standing was full of swallows. One couple seemed to have put their nest a slightly unwise, accessible place. Here's a terribly bad photo of 3 swallow chicks cowering in their nest and sitting very, very still.

We walked about 18-20km that day and I'm still busted. Partly from dragging my lunch AND extra clothes though.