In reply to BusyLizzie:
I have surprised herons a couple of times when following my nose along boggy paths near patches of water, here in Cornwall and most recently in Brittany. I'd love to meet or eavesdrop on an owl as you did. I reckon the ones you heard were discussing the etymology of joggliness.
Thread digression 1: Good to hear about The Flight of the Heron. Try Alfred Duggan for seriously good historical fiction set in ancient times up to the late medieval period.
Thread digression 2: The workers at a local authority building site right outside my house have taken to leaving a generator running all evening and all night in order to keep going some unnecessary lights that they have draped over a fence, so now we have a noise pollution and light pollution double whammy, one that I find very annoying. When I politely asked that we have quiet and darkness instead, I was told that the lights are needed to avoid a trip hazard, along a wide path where normally there is no lighting. That seems ridiculous to me. Can't people take a torch if they must walk outside at 3am or just accept that they need to go carefully?