In article , Sue & Bob Hobden
writes

Not so sure about that, the local Wren that lives in our Ivy normally
removes a lot of Sphagnum moss from my pots of Pleiones about now (I've seen
it fly off with it) and I've always assumed it was for nest building, anyone
confirm that?

Yep they do because they strip ours from round the pond, and there are
always bits hanging out of the house martin's nest that they use - but I
think it is the ferny stuff they are after, not the lumpy stuff that
grows between paving flags.
--
Jane Ransom in Lancaster.
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