@foxes37 Thank you Lis. They were nesting on the front of my brother and sister-in-law's house. I could watch house martins for hours, they're such sociable little birds.
Love to see this. We have one bird who comes to us each year but I'm afraid I shoo him away because where he wants to build is right where we sit. If ever the nest gets started I know we will leave it and suffer the results.