5 Year Member
We get gulls (and the occasional Heron) on our roof, but I agree with @gerald, theoretically it is possible, but so is being killed by a falling tree or winning the lottery (and the latter of these is actually much more likely than the former).I was informed on another forum that birds pooping on the roof might be a problem when collecting rainwater? Because the poop might have diseases if the birds eat fish?
Seems a sensible option.I'd continue the 10 minute flush before collection. Most debris and 'organics' should be flushed away by then.