L. crumenifer L. dubius L. javanicus Cryptociconia Leptoptilos is a genus of very large tropical storks, commonly known as adjutants.

Two species are resident breeders in southern Asia, and the marabou stork is found in Sub-Saharan Africa.

Leptoptilos storks are gregarious colonial breeders in wetlands, building large stick nests in trees.

Many fossils members of the genus were much larger than living species, standing as tall as a man, with the earliest being Leptoptilos falconeri from the Pliocene of Afro-Eurasia.

Giant Leptoptilos storks survived into the Late Pleistocene on the Southeast Asian islands of Java (L. titan) and Flores (L.