Guide to flora and fauna

There are many sensitive, threatened and endangered species in Hellhole Canyon. See if you can identify some of these examples on your next visit!

fauna

 
 

 

Flora

 
 

 

Sensitive or rare Species

Within Hellhole Canyon at least 18 sensitive or rare resident animal species have been detected. These species either live in the canyon year-round or are seasonal residents. Another six sensitive wildlife species have been observed in the canyon on an irregular basis.

These species are considered sensitive or rare by the federal and state governments or are target species for San Diego County’s Multiple Species Conservation Plan. The Friends has submitted over 160 sensitive animal and plant locations from Hellhole Canyon to the County of San Diego for inclusion in the North County Multiple Species Conservation Plan database. Several additional species have been detected since then.

Wildlife biologist Kristine Preston collected this data for several years during the early days of the preserve. Even with Kristine’s extensive contributions, much of the canyon is yet to be surveyed. 

Engelmann oak, a California Native Plant Society List 4 species, is widespread in the preserve. To date, there have been no focused sensitive plant surveys in Hellhole Canyon, although we hope to conduct plant surveys in the future.

 

Threatened and Endangered Species

A pair of federally listed California gnatcatchers (Polioptila californica californica) was documented inhabiting coastal sage scrub for over a year near the entrance to Hellhole Canyon Preserve. This is rather far inland for this species to occur in north San Diego County, and they have has not been seen again during the many years since. 

We are still keeping an eye out for two federally endangered species: The Quino checkerspot butterfly (Euphydryas editha quino) and the arroyo toad (Bufo microscaphus californicus). Suitable habitat for both species is prevalent in the preserve.

Please email us at hellholecanyon@gmail.com if you are a qualified wildlife expert who is interested in conducting a survey in the canyon, or if you encounter any unusual or endangered species while visiting.