Anastomus is a genus of storks in the family Ciconiidae. The genus includes two species, the Asian openbill stork (Anastomus oscitans) and the African openbill stork (Anastomus lamelligerus). Openbill storks are characterized by their long, decurved bills, which have a distinctive gap in the middle. This gap allows them to feed on snails and other mollusks, which they crush with their powerful jaws.
Openbill storks are found in wetlands throughout Africa and Asia. They are gregarious birds that often form large flocks. They are also opportunistic feeders, and will eat a variety of other animals, including insects, fish, and frogs. Openbill storks are important members of the wetland ecosystem, and they play a vital role in controlling snail populations.