Something seems to have attacked my 2 housemartin nests in the night - they have been nesting here for a few years now, started with 1 nest and then made another, it was lovely having them and every year they have produced broods. But this year I recently found one nest in pieces on the ground, previously to this a baby martin dead on the ground some way away from the nest which I couldn't understand. Last night I heard some odd noises which sounded like they were outside but on a high level. This morning I found pieces of the second nest on the ground, and saw a big hole in the side of the nest. It looks like something has attacked the nests, they wouldn't just fall into pieces like this :( could it be an owl? The reason I ask is that last week my son noticed a large owl perched on the ridge of our conservatory roof, something I'd never seen before, and I wondered if the owl might have done it? But wouldn't it have eaten the baby rather than drop it? So upsetting and I am so sad for the martings and I can't get up there to protect them, so I wonder if they are gone for good now :(
(edited as I missed one of your two posts when I initially replied) When most people get up at this time of year, it's been light for hours. What you heard may not be anything to do with the nests, or could have followed after the nest had partially come down.
I don't suppose a mammal can get on the roof, or is in the loft and can reach the nests?
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