Primitive Zebu cow from Sri Lanka

Like I wrote on this post, it is premature to think about which zebu breeds should be considered most reminiscent of their wild type, the Asian aurochs, and which should be used in a breeding-back project for this subspecies. I wrote that I think actually a lot of primitive zebu cattle yet unknown to us might be grazing around in southern Asia, waiting to be discovered and used in effigy breeding. 
A photo provided by Jochen Ackermann, who recently came across a zebu herd on Sri Lanka, confirmed this. It shows a zebu cow with a perfect wild colour and - most notably - almost no "zebu hump". 

Primitive Zebu cow on Sri Lanka, photographed by Jochen Ackermann

This cow is seemingly free of taurine influence, at least there is no indication for it. I don't know the name of the breed or if it even belongs to a specific breed. The other cows in the herd were coloured similar but more "usual" for zebus, with a prominent dilution on the ventral side of the body and/or also white spots. The bulls were elusive, but their hump was considerably larger. Indeed there seems to be a trend for the hump to be sexually dimorphic in more primitive zebus in Asia, judging from other photos I have seen. A herd of zebu-gray cattle hybrids at the zoo of Haag, Austria, also had bulls displaying a zebu hump but cows virtually lacking it. Perhaps the size of this appendage is related to the testosterone level. I still think it is a domestic feature and effigy breeding should try to reduce it as much as possible, and cows like that above certainly would be very helpful. But also her perfect wild type colour, the long legs and snout make me optimistic for effigy breeding with zebu. Unlike the case of the European aurochs, it might not be possible to reconstruct the phenotype of the Indian aurochs completely because zebus are more phenotypically derived, but achieving zebus with wild type colour, small humps, long legs and skulls and large, aurochs-like horns is absolutely possible, and all the rest could be done by mother nature later on. I hope that some suited Indian wildlife reserves will have such "wild zebus" one day.