Pete Oxford / Southern hognose snake (Heterodon simus) Captive, endemic to the Southeastern United States. Vulnerable species.

David Tipling / Humboldt's hog-nosed skunk (Conepatus humboldtii) Torres del Paine National Park, Patagonia, Chile, November.

Nick Garbutt / Male Malagasy Hog-nosed Snake (Leioheterodon madagascariensis) on forest floor with tourist / photographer in the background. Ankarana National Park, northern Madagascar.

Suzi Eszterhas / Hog-nosed Pit Viper (Bothrops nasutus) Northern Costa Rica, Central America

Ernie Janes / Western Hog-nosed Snake (Heterodon nasicus) captive species from North America and Mexico

Michael D. Kern / Lansbergi's hognosed pitviper (Porthidium lansbergii lansbergii) captive, from central and south America

MYN / Brady Beck / Eastern hognose snake (Heterodon platirhinos) coiled, Scotland County, North Carolina, USA, May, meetyourneighboursproject.net

Pete Oxford / Southern Hognose Snake (Heterodon simus), native to the southeastern United States

Barry Mansell / Western Hog-nosed Snake (Heterodon nasicus) lying in sand, Arizona, USA

Michael D. Kern / Lansbergi pitviper (Porthidium lansbergii rozei) captive, from Central and South America

Michael D. Kern / Tri-colour hognose snake {Lystrophis pulcher} captive, from South America

Michael D. Kern / Western hognose snake {Heterodon nasicus} upside down with mouth open feigning death, captive, from western USA