Hebius concelarus

Hebius concelarus (Hebius concelarus) is a keelback snake in the family Colubridae, requiring detailed scale and pattern comparisons with other closely related Ryukyu Hebius. Identification should combine documented pattern, scalation, body form and locality because related Japanese reptiles may be very similar. Claims here are limited to the opened species accounts (Wikipedia, general species account; Reptile Database). Field identification should therefore remain cautious wherever photographs or diagnostic measurements are unavailable.

It is found in Japan's Ryukyu Islands; the opened species account establishes that distribution but not enough species-level diet, habitat or reproduction for additional claims. Information absent from those species-level sources is omitted rather than inferred from relatives. Japanese occurrence follows the site's catalogue and the opened distribution accounts (Wikipedia, general species account; Reptile Database). This conservative treatment keeps unresolved parts of its natural history clearly visible to readers.