The sailfin dragon is a master of running across water like a lizard

Nature · Published 3 October 2026 Swipe more like this →

In short: Known for the distinct sail-like structure on their tails, sailfin dragons are semiaquatic lizards native to Indonesia and the Philippines. These remarkable creatures possess the unique ability to sprint across water surfaces for short distances, utilizing their feet and tails for support in a manner reminiscent of the famous basilisk lizards.

The genus Hydrosaurus, which comprises the sailfin dragons or sailfin lizards, represents the sole members of the subfamily Hydrosaurinae within the family Agamidae. These reptiles are primarily found in habitats near water, including rivers and mangrove swamps. Their name is derived from the prominent, sail-like crest that extends along their tails, a feature that distinguishes them from other lizard groups.

The taxonomy of these lizards has undergone significant revision over the last century. Historically, the genus was referred to as Lophura, but in 1903, Poche identified that this name was already occupied by a genus of pheasants. For many years, populations in Sulawesi were classified under the species H. amboinensis, a classification that dates back to Günther in 1873. However, recent scientific work by Denzer et al. in 2020 led to the resurrection of H. celebensis and H. microlophus. This taxonomic shift increased the recognized number of species within the genus from three to five, a figure currently accepted by the Reptile Database.

Despite their unique biological adaptations, sailfin dragons face significant environmental pressures. They are currently threatened by the dual impacts of habitat loss and overcollection for the international wild-animal trade. Because they are restricted to specific regions—four species are native to Indonesia and one to the Philippines—the preservation of their semiaquatic environments is critical to their survival. Understanding their evolutionary history and current taxonomic status is essential for conservation efforts aimed at protecting these specialized reptiles from further decline.

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