It is easy accessible hiking trail, only 6 km from the town of Tartu. Because of river and large ponds, there are a lot of birds around. We walked during spring season. It was pleasant and easy walk (but be aware of possibility of high water). There were a lot of fishermen around.
More than 200 bird spices have been counted in this area.
The list with latin names is here: http://www.estbirding.ee/linnualad/ilmatsalu-linnuala
Personally I do not know much about birds, but even during this short walk we saw a lot of interesting water birds I never have seen in Estonia before. Birdwathcing tower, wooden bridge, nice picnic area and toilet can be found as well.