Nata Bird Sanctuary is a community-based wildlife conservation project. It's situated to the northeast of the Sowa pan, which fills with water in the rainy season and is one of two breeding grounds for the lesser flamingo in southern Africa (Etosha Pan in Namibia being the other breeding site). The landscape is very flat and grassy with trees only at the periphery along the road. There's a wooden platform at the edge of the pan which is popular for sundowners on the "pan drive" through the local hotels like Nata Lodge.
We visited in February when the pan was full of water and rainy season still under way (so lots of rain in the evening and overnight). Notably we saw bee eaters, rollers, cranes, greater and lesser flamingos, pelicans, small waterfowl, ducks, korhhans, ostrich, and spoonbills. For mammals, we saw springbok and wildebeest (both with babies)! Recently, the size of the park expanded and the fences were taken down, which unfortunately means that you're likely to see cattle crazing in the Sanctuary along side the antelope. One cow was hopping around with her head low because she had her front leg caught in the chain around her neck and couldn't lower her foot or raise her head. When our guide went to try to help, the cows wouldn't respond to his calls and he saw that they were unbranded, so he thinks they are untrained and no longer being taken care of. It was very sad.
We went on two pan drives organized through Nata Loge--one in the evening and one in the morning. We didn't see a single other vehicle in the park on either drive. The road was definitely tenuous in the rainy season (December through March ish). We have a 4x4 but are unexperienced so it wasn't worth it for us to risk getting stuck or sunk. I'm sure it's fine to self-drive during the dry season (May-October ish). Interestingly, the sanctuary has a bar on site. We didn't go, but I'd be interested to hear from someone who did!