Other common names

Miami Black-headed Snake

Basic description

Most adult Rim Rock Crowned Snakes are about 7-9 inches (18-23 cm) in total length. These small and thin snakes are tan to light brown with a dark brown or black head and neck. The tip of the snout is tan-colored. The eyes are small. Juveniles are similar in coloration to adults.

Range in Florida

Rim Rock Crowned Snakes occur only in Miami-Dade (mainland) and Monroe (Florida Keys) counties. It has been found from Key Largo to Key West in the Florida Keys. This species only occurs in Florida.

Assessment of risk to people and pets

Non-Venomous Rim Rock Crowned Snakes are not dangerous to people or pets even though they likely produce a mild venom that is used for subduing prey. The venom is delivered by two slightly enlarged grooved teeth at the back of the upper jaw. However, these snakes are not aggressive and do not bite even in defense.

Comparison with other species

Ring-necked Snake (Diadophis punctata) Non-venomous

Rough Earthsnake (Haldea striatula) Non-venomous

Dekay’s Brownsnake (Storeria dekayi) Non-venomous

Florida Brownsnake (Storeria victa) Non-venomous

Florida Crowned Snake (Tantilla relicta) Non-venomous

Smooth Earthsnake (Virginia valeriae) Non-venomous

Share your observations

You can help scientists better understand the biology and distribution of this species by sharing your observations. Send photos or videos of interesting observations, along with associated information, by emailing the herpetology staff at the Florida Museum for documentation in the Museum’s Herpetology Master Database. You can also post your observations on iNaturalist.

Additional helpful information

Do you have snakes around your house? Learn how to safely co-exist with snakes.

Still have questions about snakes or identifications? Feel free to email the herpetology staff at the Florida Museum with your questions or feedback on this profile.

Banner photo courtesy of Dustin Smith. Please credit any photographers on the page and see our copyright policy.