At least plenty of mud around the fringes of the ponds and streams for them.The strange thing is now not an ounce of damp mud to build with ! Hopefully different by the time they pair and want to start!
My Grandparents generation didn't turn cattle out to grass until they saw two swallows.
I'm still waiting to see my first pair, but we do have a few cows out .................. they will be turning in their graves !!