I know this is a gardening group, and I am not off topic, honest!.

I have a wren and a wagtail attacking the moss between flags. If only they
removed it all I would be very happy, however I suspect they are really
going after the insects not the moss.

My question is, shortly I will want to clean the moss off, I normally use
sodium chlorate, will this harm the birds? If so what product can I safely
use.
TIA
John T

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