One of the landmarks of the Kalahari are the enormous nests built by sociable weavers. Up to 500 weavers house in such communal nesting site. They are often joined by other birds, like the pygmy falcon, the smallest raptor of Africa. Studies show that they keep the population of weavers under control, by feeding on the chicks. This is one of the many conservancy studies conducted at Tswalu. We were fortunate to join the researchers to catch the falcons at their nests, check on their health and ring them.