I've not put anything here for several weeks, having been writing a journal article on Korean issues.
I've also been distracted by reading Peter Godfrey-Smith's Other Minds: The Octopus and the Evolution of Intelligent Life, (2016) where he notes that pigeons, if given a task with one eye masked, do not know how to perform it when the mask is swapped to the other eye [p1048 of 3690, electronic version]. In other words, their eyes have separate brain systems. Moreover [p1070 of 3690] there are red and yellow portions of each eye's vision (in pigeons) that look to the front and the side... and the two different parts of one eye don't talk to each other.
It is evident from political debate and non-debate here that we may be as evolved as pigeons, though pigeons may demur.
But to get back to the naturally bird-brained... I have to wonder about bowerbird vision and the pattern of the dance being for the bird in the bower to see primarily with left eye. The speculation of the Borgia group at U Maryland is that this is an evolved dance hall pattern that saves the female from rape. But perhaps it involves something in their vision instead or as well.
BUT MERCIFULLY, OR ANYWAY we did catch two interesting three minute clips on 14 May, in which firstly, a mature male is seen yanking the bower apart... and then 20 minutes later, Odimbar is back and swiftly rebuilding, venting a bit of irritation on a hapless Wonga Pigeon just trying to feel good in the rain.
There is of course another possible explanation – that the one bird took down his structure to improve it... But then the destroyer also stole a bottletop.
Then at the end a very short clip after Odimbar has done his rebuild, in which he lets out a great yell to tell the world that this is his domain!