Can anyone advise?
We have two swift nests in our house (either side under the eaves)
Today we have noticed that one of the nests appears to be being broken up:
Is this normal?
Funnily enough, I've currently got a couple of swifts swooping up to the house, looking at the house martin nests, as well as the two swift boxes (that sparrows have used). However, realistically, your birds are house martins as the nest in the photo is a martin nest. Three possibilities. Least likely is great spotted woodpecker. Likely in terms of predating nest, but not the usual damage I'd expect to see. The other two options are natural partial collapse or house sparrow interference. Do you have house sparrows?
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