I have found this article on website of Cologne zoo:
Zoo-Koeln: Zoostudie vom 18.5.
I dont understand much with my German skills but it is a new study of best large zoo (more than 1 million visitors per year) in Europe.
I think the chart looks fine for me. There are really good zoos. I would change the order of zoos....but this wouldnt be objective chart, because I see zoos from the point of view of zoologist (so I look for the interesting species in interesting houses and enclosures) not from the visitors point of view (admission, fun, food, playground for children, touch animals)
Zoo-Koeln: Zoostudie vom 18.5.
I dont understand much with my German skills but it is a new study of best large zoo (more than 1 million visitors per year) in Europe.
I think the chart looks fine for me. There are really good zoos. I would change the order of zoos....but this wouldnt be objective chart, because I see zoos from the point of view of zoologist (so I look for the interesting species in interesting houses and enclosures) not from the visitors point of view (admission, fun, food, playground for children, touch animals)