All WWT's have areas where people can see foreign wildfowl but they also have hides that look out over natural habitat with wild british wildlife.
I live 5 minutes away from Wales WWT and visit 2 or 3 times a week and if you look at my web site, about 50% of my bird photographs were taken there, all native species. Also most of my Dragon/Damselflies,
Weasel, Reptile, and other stuff.
Jon, to say it's a zoo is an insult to Peter Scott.
Dai