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Message: <blockquote data-quote="Cicada" data-source="post: 3400241" data-attributes="member: 71348">Could they have moved somewhere else nearby?Twenty years ago there was a thriving house martin colony of 20 or more nests on a farm a quarter of a mile from where I live. Then ten years ago they suddenly deserted it and relocated to my house and neighbouring properties. I don't know why they did it, nothing changed at the farm but it was definitely an instant thing and not a gradual migration. The former site is still deserted.Also, it's only in the last couple of days that the house martins have actually started visiting the current nest site for more than a quick look - no major repairs yet. They have spent the last three weeks away from the colony area only visiting occasionally. So all is not lost, your friend's house martins might still appear.</blockquote>