Helicops modestus

{{Short description|Species of snake}}

{{Speciesbox

| image =

| image_caption =

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author1=Silveira, A.L. |author2=Prudente, A.L. da C. |author3=Argôlo , A.J.S. |author4=Abrahão, C.R. |author5=Nogueira, C. de C. |author6=Strüssmann , C. |author7=Loebmann, D. |author8=Barbo, F.E. |author9=Franco, F.L. |author10=Costa, G.C. |author11=de Moura, G.J.B. |author12=Zaher, H. el D. |author13=Borges-Martins, M. |author14=Martins, M.R.C. |author15=Oliveira , M.E. |author16=Hoogmoed, M.S. |author17=Marques, O.A.V. |author18=Passos, P.G.H. |author19=Bérnils, R.S. |author20=Kawashita-Ribeiro, R.A. |author21=Sawaya, R.J. |author22=da Costa, T.B.G. |year=2019 |title=Helicops modestus |volume=2019 |page=e.T15178878A123739797|url=https://www.iucnredlist.org/species/15178878/123739797 |access-date=2 December 2021}}

| genus = Helicops

| species = modestus

| authority = Günther, 1861

}}

Helicops modestus, the olive keelback, is a species of snake in the family Colubridae. It is endemic to Brazil, and can be found in the states of São Paulo, Rio de Janeiro, Minas Gerais, Mato Grosso do Sul, Goiás, and the Federal District of Brasília.