SURVEYING FOR THE MORRO BAY KANGAROO RAT (DIPODOMYS HEERMANNI MORROENSIS) USING NON-INVASIVE BAITED CAMERA TRAPS

Brandon S Swanson; California Department of Fish and Wildlife; brandon.swanson@wildlife.ca.gov; Jon H. McCoy, Samantha A. Duston, Jon H McCoy

The Morro Bay Kangaroo Rat (Dipodomys heermanni morroensis) is a species endemic to the vicinity of Los Osos in San Luis Obispo County in coastal central California. The species was listed as endangered in 1970 and has not been seen since 1986. The Morro Bay Kangaroo Rat has been surveyed in the past but not extensively on California Department of Fish and Wildlife land where they were last detected. Using a unique non-invasive camera trap method, we surveyed the Morro Dunes Ecological Reserve from 2023-2025. To demonstrate proof of concept of this camera trapping method, we conducted surveys at Black Lake Ecological Preserve which has a known population of Lompoc Kangaroo Rat (Dipodomys heermanni arenae) and similar coastal dune scrub habitat to Morro Dunes Ecological Reserve. Lompoc Kangaroo Rats were positively detected within the first night of surveying at Black Lake. Out of 358 camera deployments across Morro Dunes Ecological Reserve, we did not detect any Morro Bay Kangaroo Rat but found that this non-invasive method worked with all other rodent species and can be very useful in determining presence/absence.

Poster Session