Yup! The vine is a volunteer from some luffas harvested TWO YEARS AGO

and left out in the rain (and therefore abandoned for scrubbers). This thing is growing out of a crack between two pavers, and has climbed the adjacent trees - I have luffa hanging 30 feet high! Talk about drought resistant, tough plants. (Resistant to vine borers, too). If you pick them early, they're a bit like zucchini (I have a number of Indian recipes for them).
The only time this has ever happened for me was one night at 3am when Tank started crowing. The next morning I found that one of his hens who had gone on walkabout the previous day and didn't go to roost had been killed overnight by a fox - I think his crow was a warning/alert. I keep my yard dark at night - I suspect lights could cause problems for some. Agree with others' experience, re: removal/separation from another (dominant) cockerel can suddenly lead to crowing (in my case, LOTS AND LOTS of crowing, as if he was catching up for lost time - though thankfully only during the day).
If your dogs were going nuts as well, I would default to the assumption of something real (dangerous or not) moving around or disturbing them at night before I culled the cockerel. But maybe that's just me.
OMG, I have finally arrived!!!! [COLOR=008000]
I HAVE A COFFEE CUP FROM MC!!!!! [/COLOR]
(I love this mug - did you see it for sale somewhere? I NEED it!!!)
I knew about Viceroys as mimics, so I looked that up, and they're not Viceroys (no horizontal black line across the hind wing). But I didn't realize the Queens were mimics until this - now I know.
Monarch vs. Viceroy:
https://www.learner.org/jnorth/tm/monarch/Viceroy1.html
Monarch vs. Queen:
https://www.learner.org/jnorth/tm/monarch/Queen.html
Woohoo!!!!!!

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- Ant Farm