[2] These relatively large lizards are named after the sail-like structure on their tails.

[3] Sailfin lizards are semiaquatic and able to run short distances across water using both their feet and tail for support, similar to the basilisks.

[4] They are threatened by both habitat loss and overcollection for the wild animal trade.

[5] Since Günther in 1873, the Sulawesi populations were considered to belong to H. amboinensis; Denzer et al. in 2020 resurrected H. celebensis and H. microlophus, increasing the number of species from three to five.

Currently, five species are valid according to the Reptile Database,[2][3][5] Makassar sailfin lizard, or Sulawesi giant sailfin dragon Halmahera Island, North Maluku (Indonesia)