The taxon is represented by ~19 species in the Ciconiidae. Molecular data are limited to mitochondrial CYB and COI genes (Corrêa de Sousa et al., 2023).

Species-level phylogeny of extant Ciconiiformes according to the results of Corrêa de Sousa et al. (2023), with the distribution of each family being indicated by the colour-code used throughout this website (Distribution code). 

Traditional genus-level classification of extant Ciconiiformes following AviList checklist v2025. (link) The number of subspecies is given in parentheses.

References

Corrêa de Sousa RP, Campos PSB, da Silva dos Santos M, O’Brien PC, Ferguson-Smith MA, Corrêa de Oliveira EH (2023), Cytotaxonomy and molecular analyses of Mycteria americana (Ciconiidae: Ciconiiformes): insights on stork phylogeny, Genes 14, e:816. (free pdf)

Liang WL, Zhou J, and Ren ZM (2019), Complete mitochondrial genome of Ciconia nigra (Ciconiiformes: Ciconiidae), a threatened stork in China, Mitochondrial DNA Part B 2, 510-511. (pdf)

Slikas B (1997), Phylogeny of the avian family Ciconiidae (storks) based on cytochrome b sequences and DNA-DNA hybridization distances, Mol. Phylogenet. Evol. 8, 275-300. (free reading)